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Helsinki University of Technology
(118 results)-
White Papers
Digital Signature in Insecure Environments
October 12, 2007, 12:00am PDT
Due to current legislation the digital signatures can be as valid as the hand written signatures. If the signing environment is compromised there is no way for the signatory to know what he/she is...
Provided by Helsinki University of Technology
-
White Papers
Dynamic Root of Trust in Trusted Computing
October 12, 2007, 12:00am PDT
In this paper the authors introduce basic knowledge of Trusted Computing briefly. And then, they describe attack towards trusted computing system, and also discuss vulnerability of modern trusted...
Provided by Helsinki University of Technology
-
White Papers
End Device Support for AAA in SIP Conferencing
October 12, 2007, 12:00am PDT
This study is a literature survey of current problems and solutions for authentication, authorization and accounting in SIP conferencing, emphasizing the challenges particularly in mobile end...
Provided by Helsinki University of Technology
-
White Papers
A Revocation, Validation and Authentication Protocol for SPKI Based Delegation Systems
January 1, 2011, 12:00am PST
In distributed systems, the access control mechanism in is often modeled after stand-alone solutions, such as A CLs. Such arrangement, however, is not ideal as the system may be mirrored around...
Provided by Helsinki University of Technology
-
White Papers
Commercial and Industrial Applications: A Study on RFID's Adoption
October 12, 2007, 12:00am PDT
In this paper, RFID as a brand-new pervasive computing technology is to be studied and discussed. In particular, its security threats are the main problems that should be found through literature...
Provided by Helsinki University of Technology
-
White Papers
Securing Network Software Using Static Analysis
October 12, 2007, 12:00am PDT
Writing network software is not easy and developing secure network software is even more challenging. A more efficient solution is required because using security professionals for software...
Provided by Helsinki University of Technology
-
White Papers
Use of Symmetric and Asymmetric Cryptography in False Report Filtering in Sensor Networks
October 12, 2007, 12:00am PDT
Sensor networks are easily deployable networks of inexpensive sensor nodes. The sensors detect events of interest, for example forest fires, battlefield events, and so on. The sensor nodes form an...
Provided by Helsinki University of Technology
-
White Papers
Security Threat to IP Less Cellular Phone - A Brief Survey
October 12, 2007, 12:00am PDT
With the development of modern society, more and more wireless communication techniques are used into people's daily life. General Packet Radio Service (GPRS) and Enhanced Data rates for GSM...
Provided by Helsinki University of Technology
-
White Papers
Security Risk in Accepting Mobile Code to Achieve Mobility for Ubiquitous Computing
October 12, 2007, 12:00am PDT
Mobile agents are part of the code that have autonomy to act independently on behalf of the user, sociability to communicate with different hosts and agents, reactivity to cope to changes in...
Provided by Helsinki University of Technology
-
White Papers
Multidimensional Linear Distinguishing Attacks and Boolean Functions
March 15, 2008, 12:00am PDT
In this paper theoretical aspects of multidimensional linear distinguishing attacks are investigated. Using known examples of highly nonlinear Boolean functions the authors demonstrate how...
Provided by Helsinki University of Technology
-
White Papers
Modularity Aspects of Disjunctive Stable Models
May 22, 2007, 12:00am PDT
Practically all programming languages used in software engineering allow to split a program into several modules. For fully declarative and non-monotonic logic programming languages, however, the...
Provided by Helsinki University of Technology
-
White Papers
Implementing Cryptography for Packet Level Authentication
July 23, 2008, 12:00am PDT
Packet Level Authentication (PLA) is a novel countermeasure against distributed denial-of-service attacks. Each packet sent across a network has a digital signature and public key attached to it,...
Provided by Helsinki University of Technology
-
White Papers
Domain-Centric View-Based Search
August 20, 2007, 12:00am PDT
In current Semantic Web view-based search systems views are formed by selecting properties and enumerating all the values as selections. This approach breaks down with multiple content types, such...
Provided by Helsinki University of Technology
-
White Papers
Attacks on Message Stream Encryption
October 14, 2008, 12:00am PDT
Message Stream Encryption (MSE) provides obfuscation, data confidentiality, and limited authentication to BitTorrent clients. Although obfuscation of header and payload data was the main design...
Provided by Helsinki University of Technology
-
White Papers
A Method to Compress and Anonymize Packet Traces
November 7, 2007, 12:00am PST
Data volume and privacy issues are one of problems related to large-scale packet capture. Utilizing flow nature of Internet traffic can reduce data volume. Removing sensitive information such as...
Provided by Helsinki University of Technology
-
White Papers
Real-Time Transport Protocol (RTP) Security
January 1, 2011, 12:00am PST
This paper describes the Real-time Transport Protocol (RTP). The emphasis is on the security features like confidentiality, integrity and authentication. RTP security features are critically...
Provided by Helsinki University of Technology
-
White Papers
Gaussian Belief With Dynamic Data and in Dynamic Network
May 5, 2009, 12:00am PDT
Message-passing algorithms have over the last two decades turned out to be an important paradigm in fields as distant as iterative decoding, image processing and AI. It has been realized that...
Provided by Helsinki University of Technology
-
White Papers
Balanced Multipath Source Routing
July 10, 2007, 12:00am PDT
The authors consider the problem of balancing the traffic load ideally over a wireless multi-hop network. In previous work, a systematic approach to this task was undertaken, starting with an...
Provided by Helsinki University of Technology
-
White Papers
Lifetime Maximization in Wireless Sensor Networks by Distributed Binary Search
November 5, 2007, 12:00am PST
The authors consider the problem of determining the transmission power assignment that maximizes the lifetime of a data-gathering wireless sensor network with stationary nodes and static...
Provided by Helsinki University of Technology
-
White Papers
Distributed Computation of Maximum Lifetime Spanning Subgraphs in Sensor Networks
September 16, 2007, 12:00am PDT
The authors present a simple and efficient distributed method for determining the transmission power assignment that maximizes the lifetime of a data-gathering wireless sensor network with...
Provided by Helsinki University of Technology
-
White Papers
Distributed Algorithms for Lifetime Maximization in Sensor Networks via Min-Max Spanning Subgraphs
February 1, 2008, 12:00am PST
The authors consider the problem of static transmission-power assignment for lifetime maximization of a wireless sensor network with stationary nodes operating in a data-gathering scenario. Using...
Provided by Helsinki University of Technology
-
White Papers
Multidimensional Walsh Transform and a Characterization of Bent Functions
July 17, 2007, 12:00am PDT
In this paper, a multidimensional Walsh transform is used to obtain a characterization of vector-valued bent function in terms of the value distributions of the translates of the function by...
Provided by Helsinki University of Technology
-
White Papers
MOBNET: The Design and Implementation of a Network Mobility Testbed for NEMO Protocol
January 1, 2011, 12:00am PST
The inherent difficulty in faithfully modeling wireless channel characteristics in simulators has prompted researchers to build wireless network testbeds for realistic testing of protocols. While...
Provided by Helsinki University of Technology
-
White Papers
On Securing Dynamic Home Agent Address Discovery of On-Board Mobile Router in Mobile IPv6 Networks
February 19, 2008, 12:00am PST
In on-board mobile networks, users are connected to a local network that attaches to the Internet via a mobile router and a wireless link. The mobile router has a central role in servicing the...
Provided by Helsinki University of Technology
-
White Papers
Towards High Quality VoIP in 3G Networks an Empirical Study
March 20, 2008, 12:00am PDT
Third Generation (3G) packet switched WCDMA networks with high-speed downlink packet access (HSPDA) are currently being deployed worldwide to provide wireless broadband connectivity. When...
Provided by Helsinki University of Technology
-
White Papers
A Long-Tail Model of Mobile Application Usage
June 28, 2010, 12:00am PDT
In management research, the long tail phenomenon is typically linked to the long-tail of product demand distribution, particularly under electronic distribution, storing and consumption of...
Provided by Helsinki University of Technology
-
White Papers
Comparison Between Security Solutions in Cloud and Grid Computing
December 2, 2010, 12:00am PST
This paper helps Grid and Cloud system administrators and researchers to have a clear definition about Grid and Cloud computing and also wants to give clear differences between Cloud and Grid...
Provided by Helsinki University of Technology
-
White Papers
Strong Authentication With Mobile Phones
December 2, 2010, 12:00am PST
Many of the services that people use daily, for example banking, have transformed from traditional customer services into Internet services. In important services, such as the banking, a strong...
Provided by Helsinki University of Technology
-
White Papers
Comparing Various Realizations of the Cloud Computing Paradigm
December 2, 2010, 12:00am PST
Cloud Computing is becoming attractive these days. Many big companies, such as Google, Amazon and IBM, have promoted their own cloud computing platforms for customers to deploy their web...
Provided by Helsinki University of Technology
-
Whitepapers
A Survey of Software as a Service Delivery Paradigm
April 20, 2009, 12:00am PDT
Software as a Service (SaaS) is a novel model of software delivery. It has been gaining momentum in recent years. More and more SaaS adoption succeeds. This paper presents an overview of this...
Provided by Helsinki University of Technology
-
Whitepapers
Energy-Adaptive Scheduling and Queue Management in Wireless LAN Mesh Networks
April 19, 2010, 12:00am PDT
Energy efficiency is of critical importance in future wireless communication systems where networked low-power devices relying on batteries should be able to communicate transparently. The authors...
Provided by Helsinki University of Technology
-
Whitepapers
Spectrum Sensing in Cognitive Radios Based on Multiple Cyclic Frequencies
July 6, 2007, 12:00am PDT
Cognitive radios sense the radio spectrum in order to find unused frequency bands and use them in an agile manner. Transmission by the primary user must be detected reliably even in the low...
Provided by Helsinki University of Technology
-
Whitepapers
Query Significance in Databases Via Randomizations
June 30, 2009, 12:00am PDT
Many sorts of structured data are commonly stored in a multi-relational format of interrelated tables. Under this relational model, exploratory data analysis can be done by using relational...
Provided by Helsinki University of Technology
-
Whitepapers
EGPRS2 Uplink Performance for GERAN Evolution
April 15, 2008, 12:00am PDT
In this paper, the authors present a higher performance uplink concept for the evolution of GSM/EDGE Radio Access Network (GERAN). The EGPRS2 UL concept can operate at 1.2 times the current GERAN...
Provided by Helsinki University of Technology
-
White Papers
Security of Wireless Sensor Network
April 19, 2009, 12:00am PDT
Wireless Sensor Networks (WSN) is an emerging technology and day by day it is attracting the attention of researchers with its challenging characteristics and diversified application domain. The...
Provided by Helsinki University of Technology
-
White Papers
Implementing Prioritized Circumscription by Computing Disjunctive Stable Models
June 18, 2008, 12:00am PDT
The stable model semantics of disjunctive logic programs is based on minimal models which assign atoms false by default. While this feature is highly useful and leads to concise problem encodings,...
Provided by Helsinki University of Technology
-
White Papers
A Translation-Based Approach to the Verification of Modular Equivalence
August 10, 2007, 12:00am PDT
In this paper, a method for verifying the equivalence of logic program modules under a Gaifman-Shapiro-style module architecture is proposed. The idea is to adapt a translation-based verification...
Provided by Helsinki University of Technology
-
White Papers
On the Optimality of Field-Line Routing in Massively Dense Wireless Multi-Hop Networks
March 5, 2009, 12:00am PST
The authors consider the load balancing problem in large wireless multi-hop networks by applying the continuum approximation. The task is to find routes, geometric curves, such that the maximal...
Provided by Helsinki University of Technology
-
White Papers
Approximating Maximum Directed Flow in a Large Wireless Network
February 28, 2009, 12:00am PST
The authors study the maximum forwarding capacity for the relay traffic that can be transmitted through a wireless multi-hop network in a single direction. The problem appears as the microscopic...
Provided by Helsinki University of Technology
-
White Papers
Impact of Size-Based Scheduling on Flow Level Performance in Wireless Downlink Data Channels
January 1, 2011, 12:00am PST
The authors analyze the impact of size-based scheduling on the flow level performance of elastic traffic in wireless downlink data channels. The impact is assessed by comparing the flow level...
Provided by Helsinki University of Technology
-
White Papers
Comparing Various Realizations of the Cloud Computing Paradigm
December 2, 2010, 12:00am PST
Cloud Computing is becoming attractive these days. Many big companies, such as Google, Amazon and IBM, have promoted their own cloud computing platforms for customers to deploy their web...
Provided by Helsinki University of Technology
-
White Papers
Strong Authentication With Mobile Phones
December 2, 2010, 12:00am PST
Many of the services that people use daily, for example banking, have transformed from traditional customer services into Internet services. In important services, such as the banking, a strong...
Provided by Helsinki University of Technology
-
White Papers
Comparison Between Security Solutions in Cloud and Grid Computing
December 2, 2010, 12:00am PST
This paper helps Grid and Cloud system administrators and researchers to have a clear definition about Grid and Cloud computing and also wants to give clear differences between Cloud and Grid...
Provided by Helsinki University of Technology
-
White Papers
A Long-Tail Model of Mobile Application Usage
June 28, 2010, 12:00am PDT
In management research, the long tail phenomenon is typically linked to the long-tail of product demand distribution, particularly under electronic distribution, storing and consumption of...
Provided by Helsinki University of Technology
-
White Papers
Towards High Quality VoIP in 3G Networks an Empirical Study
March 20, 2008, 12:00am PDT
Third Generation (3G) packet switched WCDMA networks with high-speed downlink packet access (HSPDA) are currently being deployed worldwide to provide wireless broadband connectivity. When...
Provided by Helsinki University of Technology
-
White Papers
On Securing Dynamic Home Agent Address Discovery of On-Board Mobile Router in Mobile IPv6 Networks
February 19, 2008, 12:00am PST
In on-board mobile networks, users are connected to a local network that attaches to the Internet via a mobile router and a wireless link. The mobile router has a central role in servicing the...
Provided by Helsinki University of Technology
-
White Papers
MOBNET: The Design and Implementation of a Network Mobility Testbed for NEMO Protocol
January 1, 2011, 12:00am PST
The inherent difficulty in faithfully modeling wireless channel characteristics in simulators has prompted researchers to build wireless network testbeds for realistic testing of protocols. While...
Provided by Helsinki University of Technology
-
White Papers
Multidimensional Walsh Transform and a Characterization of Bent Functions
July 17, 2007, 12:00am PDT
In this paper, a multidimensional Walsh transform is used to obtain a characterization of vector-valued bent function in terms of the value distributions of the translates of the function by...
Provided by Helsinki University of Technology
-
White Papers
Distributed Algorithms for Lifetime Maximization in Sensor Networks via Min-Max Spanning Subgraphs
February 1, 2008, 12:00am PST
The authors consider the problem of static transmission-power assignment for lifetime maximization of a wireless sensor network with stationary nodes operating in a data-gathering scenario. Using...
Provided by Helsinki University of Technology
-
White Papers
Distributed Computation of Maximum Lifetime Spanning Subgraphs in Sensor Networks
September 16, 2007, 12:00am PDT
The authors present a simple and efficient distributed method for determining the transmission power assignment that maximizes the lifetime of a data-gathering wireless sensor network with...
Provided by Helsinki University of Technology
-
White Papers
Lifetime Maximization in Wireless Sensor Networks by Distributed Binary Search
November 5, 2007, 12:00am PST
The authors consider the problem of determining the transmission power assignment that maximizes the lifetime of a data-gathering wireless sensor network with stationary nodes and static...
Provided by Helsinki University of Technology
-
White Papers
Balanced Multipath Source Routing
July 10, 2007, 12:00am PDT
The authors consider the problem of balancing the traffic load ideally over a wireless multi-hop network. In previous work, a systematic approach to this task was undertaken, starting with an...
Provided by Helsinki University of Technology
-
White Papers
Gaussian Belief With Dynamic Data and in Dynamic Network
May 5, 2009, 12:00am PDT
Message-passing algorithms have over the last two decades turned out to be an important paradigm in fields as distant as iterative decoding, image processing and AI. It has been realized that...
Provided by Helsinki University of Technology
-
White Papers
Real-Time Transport Protocol (RTP) Security
January 1, 2011, 12:00am PST
This paper describes the Real-time Transport Protocol (RTP). The emphasis is on the security features like confidentiality, integrity and authentication. RTP security features are critically...
Provided by Helsinki University of Technology
-
White Papers
A Method to Compress and Anonymize Packet Traces
November 7, 2007, 12:00am PST
Data volume and privacy issues are one of problems related to large-scale packet capture. Utilizing flow nature of Internet traffic can reduce data volume. Removing sensitive information such as...
Provided by Helsinki University of Technology
-
White Papers
Attacks on Message Stream Encryption
October 14, 2008, 12:00am PDT
Message Stream Encryption (MSE) provides obfuscation, data confidentiality, and limited authentication to BitTorrent clients. Although obfuscation of header and payload data was the main design...
Provided by Helsinki University of Technology
-
White Papers
Domain-Centric View-Based Search
August 20, 2007, 12:00am PDT
In current Semantic Web view-based search systems views are formed by selecting properties and enumerating all the values as selections. This approach breaks down with multiple content types, such...
Provided by Helsinki University of Technology
-
White Papers
Implementing Cryptography for Packet Level Authentication
July 23, 2008, 12:00am PDT
Packet Level Authentication (PLA) is a novel countermeasure against distributed denial-of-service attacks. Each packet sent across a network has a digital signature and public key attached to it,...
Provided by Helsinki University of Technology
-
White Papers
Modularity Aspects of Disjunctive Stable Models
May 22, 2007, 12:00am PDT
Practically all programming languages used in software engineering allow to split a program into several modules. For fully declarative and non-monotonic logic programming languages, however, the...
Provided by Helsinki University of Technology
-
White Papers
Multidimensional Linear Distinguishing Attacks and Boolean Functions
March 15, 2008, 12:00am PDT
In this paper theoretical aspects of multidimensional linear distinguishing attacks are investigated. Using known examples of highly nonlinear Boolean functions the authors demonstrate how...
Provided by Helsinki University of Technology
-
White Papers
Security Risk in Accepting Mobile Code to Achieve Mobility for Ubiquitous Computing
October 12, 2007, 12:00am PDT
Mobile agents are part of the code that have autonomy to act independently on behalf of the user, sociability to communicate with different hosts and agents, reactivity to cope to changes in...
Provided by Helsinki University of Technology
-
White Papers
Security Threat to IP Less Cellular Phone - A Brief Survey
October 12, 2007, 12:00am PDT
With the development of modern society, more and more wireless communication techniques are used into people's daily life. General Packet Radio Service (GPRS) and Enhanced Data rates for GSM...
Provided by Helsinki University of Technology
-
White Papers
Use of Symmetric and Asymmetric Cryptography in False Report Filtering in Sensor Networks
October 12, 2007, 12:00am PDT
Sensor networks are easily deployable networks of inexpensive sensor nodes. The sensors detect events of interest, for example forest fires, battlefield events, and so on. The sensor nodes form an...
Provided by Helsinki University of Technology
-
White Papers
Securing Network Software Using Static Analysis
October 12, 2007, 12:00am PDT
Writing network software is not easy and developing secure network software is even more challenging. A more efficient solution is required because using security professionals for software...
Provided by Helsinki University of Technology
-
White Papers
Commercial and Industrial Applications: A Study on RFID's Adoption
October 12, 2007, 12:00am PDT
In this paper, RFID as a brand-new pervasive computing technology is to be studied and discussed. In particular, its security threats are the main problems that should be found through literature...
Provided by Helsinki University of Technology
-
White Papers
A Revocation, Validation and Authentication Protocol for SPKI Based Delegation Systems
January 1, 2011, 12:00am PST
In distributed systems, the access control mechanism in is often modeled after stand-alone solutions, such as A CLs. Such arrangement, however, is not ideal as the system may be mirrored around...
Provided by Helsinki University of Technology
-
White Papers
End Device Support for AAA in SIP Conferencing
October 12, 2007, 12:00am PDT
This study is a literature survey of current problems and solutions for authentication, authorization and accounting in SIP conferencing, emphasizing the challenges particularly in mobile end...
Provided by Helsinki University of Technology
-
White Papers
Dynamic Root of Trust in Trusted Computing
October 12, 2007, 12:00am PDT
In this paper the authors introduce basic knowledge of Trusted Computing briefly. And then, they describe attack towards trusted computing system, and also discuss vulnerability of modern trusted...
Provided by Helsinki University of Technology
-
White Papers
Digital Signature in Insecure Environments
October 12, 2007, 12:00am PDT
Due to current legislation the digital signatures can be as valid as the hand written signatures. If the signing environment is compromised there is no way for the signatory to know what he/she is...
Provided by Helsinki University of Technology
-
White Papers
Methods for Identifying Unwanted Network Traffic
October 12, 2007, 12:00am PDT
The amount of unwanted network traffic on the Internet is constantly increasing and it seems that currently there are no methods to identify and filter out such traffic. Before a solution can be...
Provided by Helsinki University of Technology
-
White Papers
Security Threats of Mobile Service User
October 12, 2007, 12:00am PDT
The paper studies the security threats involved in using modern mobile phone for accessing Internet services. The capabilities of such a phone are explained. Examples of different types of...
Provided by Helsinki University of Technology
-
White Papers
UPnP Networking: Architecture and Security Issues
October 12, 2007, 12:00am PDT
Universal Plug and Play (UPnP) sets a distributed computing framework which takes leverage from existing web technologies and network protocols for connecting different computing resources and...
Provided by Helsinki University of Technology
-
White Papers
Host Naming and URL Conventions
October 12, 2007, 12:00am PDT
The most basic thing that needs to be considered by every organization before rolling out new servers or developing new web-based applications which would be accessed by customers and clients via...
Provided by Helsinki University of Technology
-
White Papers
Security of Data Warehousing Server
October 12, 2007, 12:00am PDT
The aim is to study the data warehouse specific security needs which means focusing on the long life cycle of the data and the data security and privacy issues. This requirement needs to be...
Provided by Helsinki University of Technology
-
White Papers
Ad Hoc Conferencing in the IMS
October 12, 2007, 12:00am PDT
This study focuses on ad hoc conferencing in the IMS, and particularly on the security issues. As in the Internet, conference servers, which in IMS are the AS/MRFC, make it easy to set up and...
Provided by Helsinki University of Technology
-
White Papers
User-Centered Design of Secure Software
January 1, 2011, 12:00am PST
With the advance of electronic commerce and other networked services there is a growing need for easy to use secure software. The problem with the security features and applications in much of...
Provided by Helsinki University of Technology
-
White Papers
Posture of an End Point
October 12, 2007, 12:00am PDT
The security of the network and its resources is one of the primary concerns for organizations these days. With the world getting increasingly mobile and a growing threat from malicious codes like...
Provided by Helsinki University of Technology
-
White Papers
Implementing an SPKI Certificate Repository Within the DNS
January 1, 2011, 12:00am PST
Authorization certificates can be used to grant access rights from the owner of a resource to other entities and then to further share these rights with others using delegation. However, when...
Provided by Helsinki University of Technology
-
White Papers
Security Concerns in Worm Containment Using Vigilante
October 12, 2007, 12:00am PDT
With the Internet taking increasingly integral role in the everyday lives, the researchers are struggling to leverage all more sophisticated technologies for fighting malicious software. A...
Provided by Helsinki University of Technology
-
White Papers
Tag, You're It - NFC in a Home Environment
March 5, 2007, 12:00am PST
This paper envisions the application of Near Field Communication (NFC) in a home environment. Several NFC solutions are currently available in the logistics industry relying on Radio Frequency...
Provided by Helsinki University of Technology
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