Correlation attacks on cascades of clock controlled shift registers

1996 ◽  
pp. 346-359 ◽  
Author(s):  
Willi Geiselmann ◽  
Dieter Gollmann
Keyword(s):  
Correlation Attacks

scholarly journals 20,000 In League Under the Sea: Anonymous Communication, Trust, MLATs, and Undersea Cables

2015 ◽  
Vol 2015 (1) ◽  
pp. 4-24 ◽  
Author(s):  
Aaron D. Jaggard ◽  
Aaron Johnson ◽  
Sarah Cortes ◽  
Paul Syverson ◽  
Joan Feigenbaum
Keyword(s):  
Autonomous System ◽  
Probability Distributions ◽  
Arms Race ◽  
Experimental Results ◽  
Modular System ◽  
Anonymous Communication ◽  
Legal Assistance ◽  
Correlation Attacks ◽  
Submarine Cables ◽  
Undersea Cables

Abstract Motivated by the effectiveness of correlation attacks against Tor, the censorship arms race, and observations of malicious relays in Tor, we propose that Tor users capture their trust in network elements using probability distributions over the sets of elements observed by network adversaries. We present a modular system that allows users to efficiently and conveniently create such distributions and use them to improve their security. To illustrate this system, we present two novel types of adversaries. First, we study a powerful, pervasive adversary that can compromise an unknown number of Autonomous System organizations, Internet Exchange Point organizations, and Tor relay families. Second, we initiate the study of how an adversary might use Mutual Legal Assistance Treaties (MLATs) to enact surveillance. As part of this, we identify submarine cables as a potential subject of trust and incorporate data about these into our MLAT analysis by using them as a proxy for adversary power. Finally, we present preliminary experimental results that show the potential for our trust framework to be used by Tor clients and services to improve security.

scholarly journals Vertical and horizontal correlation attacks on RNS-based exponentiations

2015 ◽  
Vol 5 (3) ◽  
pp. 171-185 ◽  
Author(s):  
Guilherme Perin ◽  
Laurent Imbert ◽  
Philippe Maurine ◽  
Lionel Torres
Keyword(s):  
Correlation Attacks

Correlation Attacks

2013 ◽  
pp. 91-115
Author(s):  
Andreas Klein
Keyword(s):  
Correlation Attacks

scholarly journals Performance Analysis Of Secured Synchronous Stream Ciphers

2011 ◽  
pp. 22-26
Author(s):  
Padmalatha Eddla ◽  
R.Ravinder Reddy
Keyword(s):  
Information And Communication Technologies ◽  
Data Encryption ◽  
Stream Ciphers ◽  
Divide And Conquer ◽  
Clock Frequency ◽  
Sensitive Data ◽  
Good Efficiency ◽  
Digital Storage ◽  
Gate Count ◽  
Correlation Attacks

The new information and communication technologies require adequate security. In the past decades ,we have witnessed an explosive growth of the digital storage and communication of data ,triggered by some important breakthroughs such as the Internet and the expansive growth of wireless communications. In the world of cryptography ,stream ciphers are known as primitives used to ensure privacy over communication channel and these are widely used for fast encryption of sensitive data. Lots of old stream ciphers that have been formerly used no longer be considered secure ,because of their vulnerability to newly developed cryptanalysis techniques. Many designs stream ciphers have been proposed in an effort to find a proper candidate to be chosen as world standard for data encryption. From these designs, the stream ciphers which are Trivium,Edon80 and Mickey are implemented in ‘c’ language with out affecting their security .Actually these algorithms are particularly suited for hardware oriented environments which provides considerable security and efficiency aspects. We will be targeting hardware applications, and good measure for efficiency of a stream cipher in this environment is the number of key stream bits generated per cycle per gate. For good efficiency we are approaching two ways .One approach is minimizing the number of gates.The other approach is to dramatically increase the number of bits for cycle. This allows reducing the clock frequency at the cost of an increased gate count. Apart from the implementation the analysis which includes the security of these algorithms against some attacks related to stream ciphers such as guess and deterministic attacks, correlation attacks, divide and conquer attacks and algebraic attacks are presented.

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