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pki
(327 results)-
White Papers
Receiver-Deniable Public-Key Encryption Is Impossible
Jan 2011
A receiver-deniable public-key cryptosystem is a public-key cryptosystem where the receiver can change her secret key as to make it look like a given ciphertext decrypts to some message different...
Provided by Aarhus University
-
White Papers
After-the-Fact Leakage in Public-Key Encryption
Jan 2011
What does it mean for an encryption scheme to be leakage-resilient? Prior formulations require that the scheme remains semantically secure even in the presence of leakage, but only considered...
Provided by Cornell University
-
White Papers
A New Framework for Password-Based Authenticated Key Exchange
Jun 2010
Protocols for Password-based Authenticated Key Exchange (PAKE) allow two users who share only a short, low-entropy password to agree on a cryptographically strong session key. The challenge in...
Provided by University of Maryland
-
White Papers
Public-Key Encryption With Fuzzy Keyword Search Withstanding Keyword Guessing Attacks
Dec 2010
With tremendous interests having been attracted, Public-key Encryption with Keyword Search (PEKS) achieves the searchability of public-key encrypted keywords. However, nearly all existing PEKS...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Side-Channel Attacks on the McEliece and Niederreiter Public-Key Cryptosystems
Sep 2010
Research within "Post-quantum" cryptography has focused on development of schemes that resist quantum cryptanalysis. However, if such schemes are to be deployed, practical questions of efficiency...
Provided by University of Bristol
-
White Papers
PEKSrand: Providing Predicate Privacy in Public-Key Encryption With Keyword Search
Sep 2010
Recently, Shen, Shi, and Waters introduced the notion of predicate privacy, i.e., the property that t(x) reveals no information about the encoded predicate p, and proposed a scheme that achieves...
Provided by Concordia University
-
White Papers
How to Implement the Public Key Operations in Code-Based Cryptography on Memory-Constrained Devices
Sep 2010
While it is generally believed that due to their large public key sizes code based public key schemes cannot be conveniently used when memory-constrained devices are involved, the authors propose...
Provided by Technische Universitat Darmstadt
-
White Papers
A Strong Blind Signature Scheme Over Braid Groups
Dec 2009
The rapid development of quantum computing makes public key cryptosystems not based on commutative algebraic systems hot topic. Because of the non-commutativity property, the braid group with...
Provided by International Association for Cryptologic Research
-
White Papers
Flexible Quasi-Dyadic Code-Based Public-Key Encryption and Signature
May 2010
Drawback of code-based public-key cryptosystems is that their public-key size is large. It takes some hundreds KB to some MB for typical parameters. While several attempts have been conducted to...
Provided by National Institute of Advanced Industrial Science and Technology (AIST)
-
White Papers
New Cryptosystems From CSP-Based Self-Distributive Systems
Apr 2010
The authors propose new cryptosystems based on self-distributive systems that are defined by Conjugator Searching Problems (CSP) in noncommutative groups. Under the newly developed cryptographic...
Provided by University of Tsukuba
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White Papers
Security Analysis and Design of Proxy Signature Schemes Over Braid Groups
Sep 2009
The braid groups have attracted much attention as a new platform of constructing cryptosystems. This paper firstly analyzes the security vulnerabilities of existing proxy signature schemes over...
Provided by International Association for Cryptologic Research
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White Papers
Bounded Key-Dependent Message Security
Oct 2009
The authors construct the first public-key encryption scheme that is proven secure (in the standard model, under standard assumptions) even when the attacker gets access to encryptions of...
Provided by Princeton University
-
White Papers
Public-Key Encryption in the Bounded-Retrieval Model
Oct 2009
The authors construct the first public-key encryption scheme in the Bounded-Retrieval Model (BRM), providing security against various forms of adversarial "Key leakage" attacks. In this model, the...
Provided by Weizmann Institute of Science
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White Papers
Cryptanalysis of Two Knapsack Public-Key Cryptosystems
Nov 2009
In this paper, the authors cryptanalyze two knapsack cryptosystems. The first one is proposed by Hwang et al, which is based on a new permutation algorithm named Permutation Combination Algorithm....
Provided by Shandong University
-
White Papers
Public-Key Cryptographic Primitives Provably as Secure as Subset Sum
Nov 2009
The authors propose a semantically-secure public-key encryption scheme whose security is polynomial-time equivalent to the hardness of solving random instances of the subset sum problem. The...
Provided by Tel-Aviv University
-
White Papers
Poly-Dragon: An Efficient Multivariate Public Key Cryptosystem
Dec 2009
In this paper the authors propose an efficient multivariate public key cryptosystem. Public key of the cryptosystem contains polynomials of total degree three in plaintext and ciphertext...
Provided by Indian Institute of Technology Guwahati
-
White Papers
Identity Based Group Signatures From Hierarchical Identity-Based Encryption
Jul 2009
A number of previous papers explored the notion of identity-based group signature. The authors present a generic construction of identity-based group signatures. The construction is based on the...
Provided by University of Bristol
-
White Papers
Asynchronous Distributed Private-Key Generators for Identity-Based Cryptography
Jun 2010
An Identity-Based Encryption (IBE) scheme can greatly reduce the complexity of sending encrypted messages over the Internet. However, an IBE scheme necessarily requires a Private-Key Generator...
Provided by University of Waterloo
-
White Papers
A Multivariate Signature Scheme With an Almost Cyclic Public Key
Sep 2009
Multivariate public key cryptography is one of the main approaches to guarantee the security of communication in a post quantum world. One of the major drawbacks in this area is the huge size of...
Provided by Technische Universitat Darmstadt
-
White Papers
Cryptanalysis of the Niederreiter Public Key Scheme Based on GRS Subcodes
Sep 2009
In this paper a new structural attack on the McEliece/Niederreiter public key cryptosystem based on subcodes of generalized Reed-Solomon codes proposed by Berger and Loidreau is described. It...
Provided by International Association for Cryptologic Research
-
White Papers
Chosen-Ciphertext Secure Encryption From Hard Algebraic Set Systems
Mar 2009
The authors put forward the new abstract framework of "Hard algebraic set systems" that allows to construct efficient chosen-ciphertext secure encryption schemes under computational (rather than...
Provided by Leiden University
-
White Papers
Multiple and Unlinkable Public Key Encryption Without Certificates
Mar 2009
The authors newly propose a multiple and unlinkable identity-based public key encryption scheme. Unlike the traditional public key encryption and identity-based encryption schemes, the scheme...
Provided by University of Central Florida
-
White Papers
Related Message Attacks to Public Key Encryption Schemes: Relations among Security Notions
May 2009
Consider a scenario in which an adversary, attacking a certain public key encryption scheme, gains knowledge of several ciphertexts which underlying plaintext are meaningfully related with a given...
Provided by Universidad Rey Juan Carlos
-
White Papers
A Brief History of Provably-Secure Public-Key Encryption
Feb 2009
Public-key encryption schemes are a useful and interesting field of cryptographic study. The ultimate goal for the cryptographer in the field of public-key encryption would be the production of a...
Provided by University of London
-
White Papers
On the Insecurity of Parallel Repetition for Leakage Resilience
Jul 2010
A fundamental question in leakage-resilient cryptography is: Can leakage resilience always be amplified by parallel repetition? It is natural to expect that if people have leakage-resilient...
Provided by University of Texas
-
White Papers
A Public Key Encryption Scheme Secure Against Key Dependent Chosen Plaintext and Adaptive Chosen Ciphertext Attacks
Jan 2009
Recently, at Crypto 2008, Boneh, Halevi, Hamburg, and Ostrovsky (BHHO) solved the longstanding open problem of "Circular encryption," by presenting a public key encryption scheme and proving that...
Provided by UC Regents
-
White Papers
Combined (Identity-Based) Public Key Schemes
Feb 2009
Consider a scenario in which parties use a public key encryption scheme and a signature scheme with a single public key/private key pair - so the private key sk is used for both signing and...
Provided by Universidad Rey Juan Carlos
-
White Papers
Predicate Privacy in Encryption Systems
Dec 2008
Predicate encryption is a new encryption paradigm which gives a master secret key owner fine-grained control over access to encrypted data. The master secret key owner can generate secret key...
Provided by Massachusetts Institute of Technology
-
White Papers
Security Proof for the Improved Ryu-Yoon-Yoo Identity-Based Key Agreement Protocol
Nov 2007
Key agreement protocols are essential for secure communications in open and distributed environments. The protocol design is, however, extremely error-prone as evidenced by the iterative process...
Provided by Shanghai Jiao Tong University
-
White Papers
Public Key Encryption and Encryption Emulation Attacks
Feb 2008
The main purpose of this paper is to suggest that public key encryption can be secure against the "Encryption emulation" attack (on the sender's encryption) by computationally unbounded adversary,...
Provided by The City College of The City University of New York
-
White Papers
On the Provable Security of Multi-Receiver Signcryption Schemes
Apr 2009
In ATC 2007, an identity based signcryption scheme for multiple receivers was proposed by Yu et al. In this paper, the authors first show that Yu et al.'s signcryption scheme is insecure by...
Provided by Indian Institute of Technology Madras
-
White Papers
CCA2 Secure IBE: Standard Model Efficiency Through Authenticated Symmetric Encryption
Jan 2008
The authors propose two constructions of chosen-ciphertext secure Identity-Based Encryption (IBE) schemes. The schemes have a security proof in the standard model, yet they offer performance...
Provided by University of Toronto
-
White Papers
Cryptanalysis of Rational Multivariate Public Key Cryptosystems
Sep 2007
In 1989, Tsujii, Fujioka, and Hirayama proposed a family of multivariate public key cryptosystems, where the public key is given as a set of multivariate rational functions of degree 4[5]. These...
Provided by University of Cincinnati
-
White Papers
Breaking the Symmetry: A Way to Resist the New Differential Attack
Sep 2007
SFLASH recently had been broken by Dubois, Stern, Shamir, etc., using a differential attack on the public key. The C¤− signature schemes are hence no longer practical. In this paper, the...
Provided by University of Cincinnati
-
White Papers
Certificateless Encryption Schemes Strongly Secure in the Standard Model
Dec 2007
This paper presents the first constructions for CertificateLess Encryption (CLE) schemes that are provably secure against strong adversaries in the standard model. It includes both a generic...
Provided by University of London
-
White Papers
A New Provably Secure Authentication and Key Agreement Mechanism for SIP Using Certificateless Public-Key Cryptography
Jun 2007
The Session Initiation Protocol (SIP) is considered as the dominant signaling protocol for calls over the internet. However, SIP authentication typically uses HTTP digest authentication, which is...
Provided by International Association for Cryptologic Research
-
White Papers
CRUST: Cryptographic Remote Untrusted Storage Without Public Keys
Jul 2007
This paper presents CRUST, a stackable file system layer designed to provide secure file sharing over remote untrusted storage systems. CRUST is intended to be layered over insecure network file...
Provided by Tel Aviv University
-
White Papers
A New Security Definition for Public Key Encryption Schemes and Its Applications
Aug 2007
The strongest security definition for Public Key Encryption (PKE) schemes is INDistinguishability against adaptive Chosen Ciphertext Attacks (IND-CCA). A practical IND-CCA secure PKE scheme in the...
Provided by City University of Hong Kong
-
White Papers
Efficient Password-Based Authenticated Key Exchange Without Public Information
Aug 2007
Since the first Password-based Authenticated Key Exchange (PAKE) was proposed, it has enjoyed a considerable amount of interest from the cryptographic research community. To the best knowledge,...
Provided by Shanghai Jiao Tong University
-
White Papers
Extending PKI Interoperability in Computational Grids
Mar 2008
One of the most successful working examples of virtual organizations, computational grids need authentication mechanisms that inter-operate across domain boundaries. Public Key Infrastructures...
Provided by Dartmouth College
-
White Papers
How to Implement the Public Key Operations in Code-Based Cryptography on Memory-Constrained Devices
Sep 2010
While it is generally believed that due to their large public key sizes code based public key schemes cannot be conveniently used when memory-constrained devices are involved, the authors propose...
Provided by Technische Universitat Darmstadt
-
White Papers
PEKSrand: Providing Predicate Privacy in Public-Key Encryption With Keyword Search
Sep 2010
Recently, Shen, Shi, and Waters introduced the notion of predicate privacy, i.e., the property that t(x) reveals no information about the encoded predicate p, and proposed a scheme that achieves...
Provided by Concordia University
-
White Papers
Side-Channel Attacks on the McEliece and Niederreiter Public-Key Cryptosystems
Sep 2010
Research within "Post-quantum" cryptography has focused on development of schemes that resist quantum cryptanalysis. However, if such schemes are to be deployed, practical questions of efficiency...
Provided by University of Bristol
-
White Papers
Public-Key Encryption With Fuzzy Keyword Search Withstanding Keyword Guessing Attacks
Dec 2010
With tremendous interests having been attracted, Public-key Encryption with Keyword Search (PEKS) achieves the searchability of public-key encrypted keywords. However, nearly all existing PEKS...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A New Framework for Password-Based Authenticated Key Exchange
Jun 2010
Protocols for Password-based Authenticated Key Exchange (PAKE) allow two users who share only a short, low-entropy password to agree on a cryptographically strong session key. The challenge in...
Provided by University of Maryland
-
White Papers
After-the-Fact Leakage in Public-Key Encryption
Jan 2011
What does it mean for an encryption scheme to be leakage-resilient? Prior formulations require that the scheme remains semantically secure even in the presence of leakage, but only considered...
Provided by Cornell University
-
White Papers
Receiver-Deniable Public-Key Encryption Is Impossible
Jan 2011
A receiver-deniable public-key cryptosystem is a public-key cryptosystem where the receiver can change her secret key as to make it look like a given ciphertext decrypts to some message different...
Provided by Aarhus University
-
White Papers
Generic Execution State Synchronization Framework for Authenticated Key Exchange Protocol
Feb 2011
Nowadays, most of sensitive applications over insecure network are protected by some authenticated secure channel which is highly relies on specific Authenticated Key Exchange (AKE) protocol....
Provided by Ruhr University Bochum, Germany
-
White Papers
An Efficient Certificateless Two-Party Authenticated Key Agreement Scheme From Pairings
Mar 2011
Key Agreement (KA) allows two or more users to negotiate a secret session key among them over an open network. Authenticated Key Agreement (AKA) is a KA protocol enhanced to prevent active...
Provided by Wuhan University
-
White Papers
Trapdoor one way functions associated with exponentiation
Mar 2011
This paper shows that if exponentiation b = Xk in groups of finite field units or B = [k]X in elliptic curves is considered as encryption of X with exponent k treated as symmetric key, then the...
Provided by Indian Institute of Technology Bombay
-
White Papers
Fully Homomorphic SIMD Operations
Mar 2011
At PKC 2010 Smart and Vercauteren presented a variant of Gentry's fully homomorphic public key encryption scheme and mentioned that the scheme could support SIMD style operations. The slow key...
Provided by University of Bristol
-
White Papers
A Parallel Hardware Architecture for the Solution of Linear Equation Systems Implemented over GF(2"n)
Mar 2011
A parallel hardware architecture for the solution of linear equation systems implemented over finite fields is presented in this paper. This proposed hardware architecture could be efficiently...
Provided by South China University of Technology
-
White Papers
ECDLP on GPU
Mar 2011
Elliptic Curve Discrete Logarithm Problem (ECDLP) is one of the most important hard problems that modern cryptography, especially public key cryptography, relies on. And many efforts are dedicate...
Provided by Chinese Academy of Sciences
-
White Papers
Compact McEliece keys based on Quasi-Dyadic Srivastava codes
Mar 2011
The McEliece cryptosystem is one of the few systems to be considered secure against Quantum attacks. The original scheme is built upon Goppa codes and produces very large keys, hence latest...
Provided by University of Auckland
-
White Papers
SHS: Secure Hybrid Search by Combining Dynamic and Static Indexes in PEKS
Apr 2011
With a significant advance in ciphertext searchability, Public-key Encryption with Keyword Search (PEKS) is the first keyword searchable encryption scheme based on the probabilistic encryption,...
Provided by Huazhong University of Science & Technology
-
White Papers
Short and Efficient Certificate-Based Signature
Feb 2011
In this paper, the authors propose a short and efficient Certificate-Based Signature (CBS) scheme. Certificate-based cryptography proposed by entry combines the merit of traditional Public Key...
Provided by Institute for Infocomm Research
-
White Papers
Little Dragon Two: An Efficient Multivariate Public Key Cryptosystem
Apr 2010
Public key cryptography has several practical applications, for example in e-commerce systems for authentication (electronic signatures) and for secure communication. The most widely used...
Provided by Indian Institute of Technology Guwahati
-
White Papers
A Security Protocol for Multi-User Authentication
Apr 2008
In this paper the authors propose an encryption communication protocol which also provides database security. For the encryption of the data communication they use a transformation similar to the...
Provided by Cornell University
-
White Papers
Securing U-Healthcare Sensor Networks Using Public Key Based Scheme
Feb 2008
Recent emergence of electronic culture uplifts healthcare facilities to a new era with the aid of Wireless Sensor Network (WSN) technology. Due to the sensitiveness of medical data, austere...
Provided by Kyung Hee University
-
White Papers
Improved Identity-Based Identification Using Correcting Codes
Feb 2009
One of the most critical points of Public Key Cryptography (PKC) is that of the management of the authenticity of the public key. It is the very single point that anchors public key cryptography...
Provided by University of Luxembourg
-
White Papers
On the Efficiency of Fast RSA Variants in Modern Mobile Phones
Jan 2010
Modern mobile phones are increasingly being used for more services that require modern security mechanisms such as the public-key cryptosystem RSA. It is, however, well-known that public-key...
Provided by University of Copenhagen
-
White Papers
A Secure Key Agreement Protocol Using Braid Groups
May 2010
Non commutative groups, specially Braid groups of Artin in recent years have emerged as suitable setting for cryptographic protocols. The idea of using the braid group as a platform for...
Provided by Pranveer Singh Institute of Technology, Kanpur
-
White Papers
Customized PKI for SCADA System
Mar 2010
Security of SCADA (Supervisory Control And Data Acquisition) has become a challenging issue today because of its connectivity with the outside world and remote access to the system. One major...
Provided by Indian Institute of Technology,Gandhinagar
-
White Papers
Automated Verification of Selected Equivalences for Security Protocols
Jul 2007
In the analysis of security protocols, methods and tools for reasoning about protocol behaviors have been quite effective. The authors aim to expand the scope of those methods and tools. They...
Provided by University of California
-
White Papers
Readers Behaving Badly Reader Revocation in PKI-Based RFID Systems
Jun 2010
Recent emergence of RFID tags capable of performing public key operations motivates new RFID applications, including electronic travel documents, identification cards and payment instruments. In...
Provided by University of California
-
White Papers
PQR: Finding the PKI Needles in the Internet Haystack
Feb 2008
Public-key cryptography can uniquely enable trust within distributed settings. Employing it usually requires deploying a set of tools and services collectively known as a Public Key Infrastructure...
Provided by Dartmouth College
-
White Papers
Identity-Based Encryption With Efficient Revocation
Oct 2008
Identity-Based Encryption (IBE) is an exciting alternative to public-key encryption, as IBE eliminates the need for a Public Key Infrastructure (PKI). Any setting, PKI- or identity-based, must...
Provided by Georgia Institute of Technology
-
White Papers
On Notions of Security for Deterministic Encryption, and Efficient Constructions Without Random Oracles
Feb 2009
The study of deterministic public-key encryption was initiated by Bellare et al. (CRYPTO '07), who provided the "Strongest Possible" notion of security for this primitive (called PRIV) and...
Provided by Georgia Institute of Technology
-
White Papers
Deterministic and Efficiently Searchable Encryption
Dec 2007
The authors present as-strong-as-possible definitions of privacy, and constructions achieving them, for public-key encryption schemes where the encryption algorithm is deterministic. They obtain...
Provided by University of California
-
White Papers
Multi-Recipient Encryption Schemes: Efficient Constructions and Their Security
Nov 2007
This paper proposes several new schemes which allow a sender to send encrypted messages to multiple recipients more efficiently (in terms of bandwidth and computation) than by using a standard...
Provided by University of California
-
White Papers
J-PAKE: Authenticated Key Exchange Without PKI
Aug 2010
Password Authenticated Key Exchange (PAKE) is one of the important topics in cryptography. It aims to address a practical security problem: how to establish secure communication between two...
Provided by University of Luxembourg
-
White Papers
Authenticated Broadcast With a Partially Compromised Public-Key Infrastructure
Aug 2009
Given a Public-Key Infrastructure (PKI) and digital signatures, it is possible to construct broadcast protocols tolerating any number of corrupted parties. Almost all existing protocols, however,...
Provided by University of Maryland
-
White Papers
Readers Behaving Badly: Reader Revocation in PKI-Based RFID Systems
Apr 2010
Recent emergence of RFID tags capable of performing public key operations motivates new RFID applications, including electronic travel documents, identification cards and payment instruments. In...
Provided by University of California, Irvine
-
White Papers
WM-ECC: An Elliptic Curve Cryptography Suite on Sensor Motes
Oct 2007
Even though symmetric-key scheme, which has been investigated extensively for sensor networks, can fulfill many security requirements, public-key cryptography is more flexible and simple rendering...
Provided by College of William and Mary
-
White Papers
Achieving Robust Message Authentication in Sensor Networks: A Public-Key Based Approach
May 2009
Given the extremely limited hardware resources on sensor nodes and the inclement deploying environment, the adversary Denial-of-Service (DoS) attack becomes a serious security threat toward...
Provided by Springer Science+Business Media
-
White Papers
Thwarting Blackhole Attacks in Distruption-Tolerant Networks Using Encounter Tickets
May 2009
Nodes in Disruption-Tolerant Networks (DTNs) usually exhibit repetitive motions. Several recently proposed DTN routing algorithms have utilized the DTNs' cyclic properties for predicting future...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
PDF: A Public-Key Based False Data Filtering Scheme in Sensor Networks
Jul 2007
Given the extremely limited hardware resources on sensor nodes and the inclement deploying environment, the adversary Denial-of-Service (DoS) attack becomes a serious security threat toward...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Comparing Symmetric-Key and Public-Key Based Security Schemes in Sensor Networks: A Case Study of User Access Control
Mar 2008
While symmetric-key schemes are efficient in processing time for sensor networks, they generally require complicated key management, which may introduce large memory and communication overhead. On...
Provided by College of William and Mary
-
White Papers
Active Attacks Against Modulation-Based Radiometric Identification
Aug 2009
Radiometric identification is a recently coined term that describes a broad category of techniques for determining the identity of a wireless device based on unique characteristics of its...
Provided by Rensselaer Polytechnic Institute
-
White Papers
SSE Implementation of Multivariate PKCs on Modern X86 CPUs
Jul 2009
Multivariate Public Key Cryptosystems (MPKCs) are often touted as future-proofing against Quantum Computers. It also has been known for efficiency compared to "Traditional" alternatives. However,...
Provided by International Association for Cryptologic Research
-
White Papers
Poly-Dragon: An Efficient Multivariate Public Key Cryptosystem
Dec 2009
In this paper the authors propose an efficient multivariate public key cryptosystem. Public key of the cryptosystem contains polynomials of total degree three in plaintext and ciphertext...
Provided by Indian Institute of Technology Guwahati
-
White Papers
Identity Based Group Signatures From Hierarchical Identity-Based Encryption
Jul 2009
A number of previous papers explored the notion of identity-based group signature. The authors present a generic construction of identity-based group signatures. The construction is based on the...
Provided by University of Bristol
-
White Papers
Asynchronous Distributed Private-Key Generators for Identity-Based Cryptography
Jun 2010
An Identity-Based Encryption (IBE) scheme can greatly reduce the complexity of sending encrypted messages over the Internet. However, an IBE scheme necessarily requires a Private-Key Generator...
Provided by University of Waterloo
-
White Papers
A Multivariate Signature Scheme With an Almost Cyclic Public Key
Sep 2009
Multivariate public key cryptography is one of the main approaches to guarantee the security of communication in a post quantum world. One of the major drawbacks in this area is the huge size of...
Provided by Technische Universitat Darmstadt
-
White Papers
Cryptanalysis of the Niederreiter Public Key Scheme Based on GRS Subcodes
Sep 2009
In this paper a new structural attack on the McEliece/Niederreiter public key cryptosystem based on subcodes of generalized Reed-Solomon codes proposed by Berger and Loidreau is described. It...
Provided by International Association for Cryptologic Research
-
White Papers
Chosen-Ciphertext Secure Encryption From Hard Algebraic Set Systems
Mar 2009
The authors put forward the new abstract framework of "Hard algebraic set systems" that allows to construct efficient chosen-ciphertext secure encryption schemes under computational (rather than...
Provided by Leiden University
-
White Papers
Multiple and Unlinkable Public Key Encryption Without Certificates
Mar 2009
The authors newly propose a multiple and unlinkable identity-based public key encryption scheme. Unlike the traditional public key encryption and identity-based encryption schemes, the scheme...
Provided by University of Central Florida
-
White Papers
Related Message Attacks to Public Key Encryption Schemes: Relations among Security Notions
May 2009
Consider a scenario in which an adversary, attacking a certain public key encryption scheme, gains knowledge of several ciphertexts which underlying plaintext are meaningfully related with a given...
Provided by Universidad Rey Juan Carlos
-
White Papers
A Brief History of Provably-Secure Public-Key Encryption
Feb 2009
Public-key encryption schemes are a useful and interesting field of cryptographic study. The ultimate goal for the cryptographer in the field of public-key encryption would be the production of a...
Provided by University of London
-
White Papers
The Eight Truths of Social Learning. Now.
Apr 2011
Many learning professionals are keenly interested in the topic of social learning but relatively few organizations have begun to implement it. One reason is that it is difficult to separate the...
Provided by SkillSoft
-
White Papers
On the Insecurity of Parallel Repetition for Leakage Resilience
Jul 2010
A fundamental question in leakage-resilient cryptography is: Can leakage resilience always be amplified by parallel repetition? It is natural to expect that if people have leakage-resilient...
Provided by University of Texas
-
White Papers
A Public Key Encryption Scheme Secure Against Key Dependent Chosen Plaintext and Adaptive Chosen Ciphertext Attacks
Jan 2009
Recently, at Crypto 2008, Boneh, Halevi, Hamburg, and Ostrovsky (BHHO) solved the longstanding open problem of "Circular encryption," by presenting a public key encryption scheme and proving that...
Provided by UC Regents
-
White Papers
Combined (Identity-Based) Public Key Schemes
Feb 2009
Consider a scenario in which parties use a public key encryption scheme and a signature scheme with a single public key/private key pair - so the private key sk is used for both signing and...
Provided by Universidad Rey Juan Carlos
-
White Papers
Predicate Privacy in Encryption Systems
Dec 2008
Predicate encryption is a new encryption paradigm which gives a master secret key owner fine-grained control over access to encrypted data. The master secret key owner can generate secret key...
Provided by Massachusetts Institute of Technology
-
White Papers
Security Proof for the Improved Ryu-Yoon-Yoo Identity-Based Key Agreement Protocol
Nov 2007
Key agreement protocols are essential for secure communications in open and distributed environments. The protocol design is, however, extremely error-prone as evidenced by the iterative process...
Provided by Shanghai Jiao Tong University
-
White Papers
Public Key Encryption and Encryption Emulation Attacks
Feb 2008
The main purpose of this paper is to suggest that public key encryption can be secure against the "Encryption emulation" attack (on the sender's encryption) by computationally unbounded adversary,...
Provided by The City College of The City University of New York
-
White Papers
On the Provable Security of Multi-Receiver Signcryption Schemes
Apr 2009
In ATC 2007, an identity based signcryption scheme for multiple receivers was proposed by Yu et al. In this paper, the authors first show that Yu et al.'s signcryption scheme is insecure by...
Provided by Indian Institute of Technology Madras
-
White Papers
CCA2 Secure IBE: Standard Model Efficiency Through Authenticated Symmetric Encryption
Jan 2008
The authors propose two constructions of chosen-ciphertext secure Identity-Based Encryption (IBE) schemes. The schemes have a security proof in the standard model, yet they offer performance...
Provided by University of Toronto
-
White Papers
Cryptanalysis of Rational Multivariate Public Key Cryptosystems
Sep 2007
In 1989, Tsujii, Fujioka, and Hirayama proposed a family of multivariate public key cryptosystems, where the public key is given as a set of multivariate rational functions of degree 4[5]. These...
Provided by University of Cincinnati
-
White Papers
Breaking the Symmetry: A Way to Resist the New Differential Attack
Sep 2007
SFLASH recently had been broken by Dubois, Stern, Shamir, etc., using a differential attack on the public key. The C¤− signature schemes are hence no longer practical. In this paper, the...
Provided by University of Cincinnati
-
White Papers
Certificateless Encryption Schemes Strongly Secure in the Standard Model
Dec 2007
This paper presents the first constructions for CertificateLess Encryption (CLE) schemes that are provably secure against strong adversaries in the standard model. It includes both a generic...
Provided by University of London
-
White Papers
A New Provably Secure Authentication and Key Agreement Mechanism for SIP Using Certificateless Public-Key Cryptography
Jun 2007
The Session Initiation Protocol (SIP) is considered as the dominant signaling protocol for calls over the internet. However, SIP authentication typically uses HTTP digest authentication, which is...
Provided by International Association for Cryptologic Research
-
White Papers
CRUST: Cryptographic Remote Untrusted Storage Without Public Keys
Jul 2007
This paper presents CRUST, a stackable file system layer designed to provide secure file sharing over remote untrusted storage systems. CRUST is intended to be layered over insecure network file...
Provided by Tel Aviv University
-
White Papers
A New Security Definition for Public Key Encryption Schemes and Its Applications
Aug 2007
The strongest security definition for Public Key Encryption (PKE) schemes is INDistinguishability against adaptive Chosen Ciphertext Attacks (IND-CCA). A practical IND-CCA secure PKE scheme in the...
Provided by City University of Hong Kong
-
White Papers
Efficient Password-Based Authenticated Key Exchange Without Public Information
Aug 2007
Since the first Password-based Authenticated Key Exchange (PAKE) was proposed, it has enjoyed a considerable amount of interest from the cryptographic research community. To the best knowledge,...
Provided by Shanghai Jiao Tong University
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White Papers
Extending PKI Interoperability in Computational Grids
Mar 2008
One of the most successful working examples of virtual organizations, computational grids need authentication mechanisms that inter-operate across domain boundaries. Public Key Infrastructures...
Provided by Dartmouth College
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White Papers
ABUSE: PKI for Real-World Email Trust
Jun 2009
Current PKI-based email systems (such as X.509 S/MIME and PGP/ MIME) potentially enable a recipient to determine a name and organizational affiliation of the sender. This information can suffice...
Provided by Dartmouth College
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White Papers
PEACHES and Peers
Apr 2008
How to distribute resource locators is a fundamental problem in PKI. The PKI Resource Query Protocol (PRQP), recently presented at IETF, provides a standard method to query for PKI resources...
Provided by Dartmouth College
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White Papers
Computational Techniques for Increasing PKI Policy Comprehension by Human Analysts
Apr 2010
Natural-language policies found in X.509 PKI describe an organization's stated policy as a set of requirements for trust. The widespread use of X.509 underscores the importance of understanding...
Provided by Association for Computing Machinery
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White Papers
A Computational Framework for Certificate Policy Operations
Aug 2009
The trustworthiness of any Public Key Infrastructure (PKI) rests upon the expectations for trust, and the degree to which those expectations are met. Policies, whether implicit as in PGP and...
Provided by Dartmouth College
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White Papers
Beyond PKI: The Biocyptographic Key Infrastructure
Oct 2010
Public Key Infrastructure is a widely deployed security technology for handling key distribution and validation in computer security. Despite PKI's popularity as a security solution, Phishing and...
Provided by University of Colorado
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White Papers
Construction of a Hybrid (Hierarchical) Identity-Based Encryption Protocol Secure Against Adaptive Attacks
Mar 2008
The current paper considers the problem of obtaining a Hierarchical Identity-Based Encryption (HIBE) protocol which is secure against adaptive key extraction and decryption queries. Such a...
Provided by University of Waterloo
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White Papers
Network Security White Paper
Dec 2010
Business users are becoming more mobile and are using a wider variety of devices than ever before. While this makes for a more flexible and productive workforce, it also creates significant...
Provided by CDW
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White Papers
The Case for Abstracting Security Policies
Jan 2011
As Internet connectivity grows executing untrusted code becomes an increasingly serious threat. Public Key Infrastructure (PKI) and digital signatures offer some degree of protection, but are only...
Provided by University of Cambridge
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White Papers
A User-Centric PKI Based-Protocol to Manage FC2 Digital Identities
Jan 2011
The proliferation of e-services (e.g. e-commerce, e-health, e-government) within the emerging digital Identity Management Systems make Internet an undeniable convenient and powerful tool for...
Provided by International Journal of Computer Science Issues
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White Papers
IDEAS: An Identity-Based Security Architecture for Large-Scale and High-Performance Storage Systems
Feb 2009
The authors develop IDEAS, identity-based security architecture for large-scale and high-performance storage systems, designed to improve security, convenience and total cost of access control by...
Provided by University of Nebraska-Lincoln
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White Papers
Information Security and Sender's Rights Protection Through Embedded Public Key Signature
May 2010
Information security is not just to provide an authenticity and integrity to the data, but there is also a need to seek identity, rights of use and origin of information, which may require some...
Provided by Banasthali University
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White Papers
Towards Public Key Infrastructure Less Authentication in Session Initiation Protocol
Jan 2010
The Session Initiation Protocol (SIP) has become the most predominant protocol for Voice over Internet Protocol (VoIP) signaling. Security of SIP is an important consideration for VoIP...
Provided by Islamic University of Technology
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White Papers
A Deployment Model of DNSSEC: Defining Problems and Solutions
Sep 2008
The exponential development of the activities taken into account by the current Internet and with them, the plethoric number of Net surfers with various intentions, endangers all the Internet...
Provided by Institut National Polytechnique Felix Houphouet Boigny
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White Papers
A Method for Detecting the Exposure of a Secret Key in Key-Insulated Scheme
Sep 2008
Dodis et al proposed a key-insulated signature scheme in 2003. In the scheme, total lifetime of a certificate is divided to time periods and different secret keys are used for each time period....
Provided by Sungkyunkwan University
