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Ecole normale superieure
(13 results)-
White Papers
Security Analysis of SIMD
June 1, 2010, 12:00am PDT
In this paper the authors study the security of the SHA-3 candidate SIMD. They first show a new free-start distinguisher based on symmetry relations. It allows distinguishing the compression...
Provided by Ecole normale superieure
-
White Papers
Differential Attack on Five Rounds of the SC2000 Block Cipher
December 4, 2010, 12:00am PST
SC2000 is a 128-bit block cipher with a user key of 128, 192 or 256 bits, which employs a total of 6.5 rounds for a 128-bit user key, and a total of 7.5 rounds for a 192 or 256-bit key. It was...
Provided by Ecole normale superieure
-
White Papers
Fault Attacks Against EMV Signatures
October 18, 2009, 12:00am PDT
At CHES 2009, Coron, Joux, Kizhvatov, Naccache and Paillier (CJKNP) exhibited a fault attack against RSA signatures with partially known messages. This attack allows factoring the public modulus...
Provided by Ecole normale superieure
-
White Papers
Divisibility, Smoothness and Cryptographic Applications
October 17, 2008, 12:00am PDT
This paper deals with products of moderate-size primes, familiarly known as smooth numbers. Smooth numbers play a crucial role in information theory, signal processing and cryptography. The...
Provided by Ecole normale superieure
-
White Papers
Encrypting Proofs on Pairings and Its Application to Anonymity for Signatures
December 17, 2008, 12:00am PST
The authors give a generic methodology to unlinkably anonymize cryptographic schemes in bilinear groups using the Boneh-Goh-Nissim cryptosystem and nizk proofs in the line of Groth, Ostrovsky and...
Provided by Ecole normale superieure
-
White Papers
Practical Key-Recovery for All Possible Parameters of SFLASH
May 27, 2011, 12:00am PDT
In this paper, the authors present a new practical key-recovery attack on the SFLASH signature scheme. SFLASH is a derivative of the older C encryption and signature scheme that was broken in 1995...
Provided by Ecole normale superieure
-
White Papers
Generalized Key Delegation for Hierarchical Identity-Based Encryption
June 1, 2007, 12:00am PDT
In this paper, the authors introduce a new primitive called Identity-Based Encryption with Wild-card Key Derivation (WKD-IBE, or "Wicked IBE") that enhances the concept of Hierarchical...
Provided by Ecole normale superieure
-
White Papers
Patterns and Types for Querying XML Documents
January 1, 2008, 12:00am PST
Among various proposals for primitives for deconstructing XML data two approaches seem to clearly stem from practise: path expressions, widely adopted by the database community, and regular...
Provided by Ecole normale superieure
-
White Papers
New Anonymity Notions for Identity-Based Encryption
September 12, 2008, 12:00am PDT
Identity-based encryption is a very convenient tool to avoid key management. Recipient-privacy is also a major concern nowadays. To combine both, anonymous identity-based encryption has been...
Provided by Ecole normale superieure
-
White Papers
An Application of the Goldwasser-Micali Cryptosystem to Biometric Authentication
July 4, 2007, 12:00am PDT
This paper deals with the security challenges in authentication protocols employing volatile biometric features, where the authentication is indeed a comparison between a fresh biometric template...
Provided by Ecole normale superieure
-
White Papers
Round-Optimal Privacy-Preserving Protocols With Smooth Projective Hash Functions
February 22, 2012, 12:00am PST
In 2008, Groth and Sahai proposed a powerful suite of techniques for constructing non-interactive zero-knowledge proofs in bilinear groups. Their proof systems have found numerous applications,...
Provided by Ecole normale superieure
-
White Papers
A Computationally Sound Mechanized Prover for Security Protocols
May 25, 2007, 12:00am PDT
The authors present a new mechanized prover for secrecy properties of security protocols. In contrast to most previous provers, their tool does not rely on the Dolev-Yao model, but on the...
Provided by Ecole normale superieure
-
White Papers
All-in-One Graphical Tool for the Management of Diet a GridRPC Middleware
May 26, 2008, 12:00am PDT
Grid middleware are the link between large scale (and distributed) platforms and applications. Managing such a software system and the grid environment itself can be a hard task when no dedicated...
Provided by Ecole normale superieure de Lyon
-
White Papers
A Computationally Sound Mechanized Prover for Security Protocols
May 25, 2007, 12:00am PDT
The authors present a new mechanized prover for secrecy properties of security protocols. In contrast to most previous provers, their tool does not rely on the Dolev-Yao model, but on the...
Provided by Ecole normale superieure
-
White Papers
Round-Optimal Privacy-Preserving Protocols With Smooth Projective Hash Functions
February 22, 2012, 12:00am PST
In 2008, Groth and Sahai proposed a powerful suite of techniques for constructing non-interactive zero-knowledge proofs in bilinear groups. Their proof systems have found numerous applications,...
Provided by Ecole normale superieure
-
White Papers
An Application of the Goldwasser-Micali Cryptosystem to Biometric Authentication
July 4, 2007, 12:00am PDT
This paper deals with the security challenges in authentication protocols employing volatile biometric features, where the authentication is indeed a comparison between a fresh biometric template...
Provided by Ecole normale superieure
-
White Papers
New Anonymity Notions for Identity-Based Encryption
September 12, 2008, 12:00am PDT
Identity-based encryption is a very convenient tool to avoid key management. Recipient-privacy is also a major concern nowadays. To combine both, anonymous identity-based encryption has been...
Provided by Ecole normale superieure
-
White Papers
Generalized Key Delegation for Hierarchical Identity-Based Encryption
June 1, 2007, 12:00am PDT
In this paper, the authors introduce a new primitive called Identity-Based Encryption with Wild-card Key Derivation (WKD-IBE, or "Wicked IBE") that enhances the concept of Hierarchical...
Provided by Ecole normale superieure
-
White Papers
Practical Key-Recovery for All Possible Parameters of SFLASH
May 27, 2011, 12:00am PDT
In this paper, the authors present a new practical key-recovery attack on the SFLASH signature scheme. SFLASH is a derivative of the older C encryption and signature scheme that was broken in 1995...
Provided by Ecole normale superieure
-
White Papers
Encrypting Proofs on Pairings and Its Application to Anonymity for Signatures
December 17, 2008, 12:00am PST
The authors give a generic methodology to unlinkably anonymize cryptographic schemes in bilinear groups using the Boneh-Goh-Nissim cryptosystem and nizk proofs in the line of Groth, Ostrovsky and...
Provided by Ecole normale superieure
-
White Papers
Divisibility, Smoothness and Cryptographic Applications
October 17, 2008, 12:00am PDT
This paper deals with products of moderate-size primes, familiarly known as smooth numbers. Smooth numbers play a crucial role in information theory, signal processing and cryptography. The...
Provided by Ecole normale superieure
-
White Papers
Fault Attacks Against EMV Signatures
October 18, 2009, 12:00am PDT
At CHES 2009, Coron, Joux, Kizhvatov, Naccache and Paillier (CJKNP) exhibited a fault attack against RSA signatures with partially known messages. This attack allows factoring the public modulus...
Provided by Ecole normale superieure
-
White Papers
Differential Attack on Five Rounds of the SC2000 Block Cipher
December 4, 2010, 12:00am PST
SC2000 is a 128-bit block cipher with a user key of 128, 192 or 256 bits, which employs a total of 6.5 rounds for a 128-bit user key, and a total of 7.5 rounds for a 192 or 256-bit key. It was...
Provided by Ecole normale superieure
-
White Papers
Security Analysis of SIMD
June 1, 2010, 12:00am PDT
In this paper the authors study the security of the SHA-3 candidate SIMD. They first show a new free-start distinguisher based on symmetry relations. It allows distinguishing the compression...
Provided by Ecole normale superieure
-
White Papers
All-in-One Graphical Tool for the Management of Diet a GridRPC Middleware
May 26, 2008, 12:00am PDT
Grid middleware are the link between large scale (and distributed) platforms and applications. Managing such a software system and the grid environment itself can be a hard task when no dedicated...
Provided by Ecole normale superieure de Lyon
-
White Papers
Patterns and Types for Querying XML Documents
January 1, 2008, 12:00am PST
Among various proposals for primitives for deconstructing XML data two approaches seem to clearly stem from practise: path expressions, widely adopted by the database community, and regular...
Provided by Ecole normale superieure
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