International Association for Cryptologic Research

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03:17 [Pub][ePrint] Implementing AES via an Actively/Covertly Secure Dishonest-Majority MPC Protocol, by I. Damgard and M. Keller and E. Larraia and C. Miles and N.P. Smart

  We describe an implementation of the protocol of Damgard, Pastro, Smart and Zakarias (SPDZ/Speedz) for multi-party computation in the presence of a dishonest majority of active adversaries. We present a number of modifications to the protocol; the first reduces the security to covert security, but produces significant performance enhancements; the second enables us to perform bit-wise operations in characteristic two fields. As a bench mark application we present the evaluation of the AES cipher, a now standard bench marking example for multi-party computation. We need examine two different implementation techniques, which are distinct from prior MPC work in this area due to the use of MACs within the SPDZ protocol. We then examine two implementation choices for the finite fields; one based on finite fields of size $2^8$ and one based on embedding the AES field into a larger finite field of size $2^{40}$.

06:48 [Event][New] ECC 2012: The 16th workshop on Elliptic Curve Cryptography 2012

  From October 28 to November 1
Location: Querétaro, México
More Information:

06:46 [PhD][New] Gilles Brassard: Relativized cryptography

  Name: Gilles Brassard
Topic: Relativized cryptography
Category: foundations

Description: I am sorry but this thesis was typed on a typewriter. There has never been a computerized version. If I absolutely need to do so, I shall find a printed copy and retype the abstract.[...]

06:46 [PhD][New] John E. Hopcroft

  Name: John E. Hopcroft

16:03 [PhD][New] Nicolas Guillermin: Implémentation matérielle de coprocesseurs haute performance pour la cryptographie asymétrique

  Name: Nicolas Guillermin
Topic: Implémentation matérielle de coprocesseurs haute performance pour la cryptographie asymétrique
Category: implementation

Description: In this PhD thesis I propose coprocessors architectures for high performance computations\r\nof asymmetric primitives like RSA, Elliptic Curves and Pairing. Coprocessors have\r\nbeen implemented in FPGA, and propose the lowest latency ever showed in public litterature on such targets. The novelty of these architectures is the usage of the Residue\r\nNumber System (RNS), an alternate way to represent big numbers. The work presented\r\nhere confirms with experimentation the theoretical advantages of this system previously emphasized by [14, 13, 43]. Together with this theoretical advantage RNS computation can be efficiently parallelized, and getting highly regular and parallelized architectures to reach high frequency while computing modular operations in few cycles is possible, whatever is the size of the numbers. For example, a scalar multiplication on a generic 160 elleptic curve can be executed in 0.57 ms on an Altera Stratix, and in 4 ms on a 512 bits curve, compared with classical representations which hardly do the same in twice this time with comparable technologies (except for particular curves). For Pairing the results are even more interesting, since a 4 times division of the latency had been reached by the time [35] was published, and the first time a Pairing over large characteristic fields was executed in less than 1 ms on a FPGA. Eventually, I demonstrate the ability RNS to provide original solutions to protect computations against side channel and perturbation threats. I propose 2 countermeasures to thwart faults and power analysis which can be used on every primitives\r\nrelying on big number modular arithmetic. These countermeasures are designed to be efficiently adapted on the RNS coprocessors.[...]

16:03 [PhD][New] Sylvain Duquesne

  Name: Sylvain Duquesne

09:30 [PhD][New] Luk Bettale: Algebraic Cryptanalysis: Tools and Applications

  Name: Luk Bettale
Topic: Algebraic Cryptanalysis: Tools and Applications
Category: applications

09:29 [PhD][New] Jean-Charles Faugère

  Name: Jean-Charles Faugère

09:29 [PhD][New] Ludovic Perret

  Name: Ludovic Perret

15:28 [Job][New] Cryptographer, Sphinx Solutions and Washington, DC, USA

  We are seeking someone with specialized experience developing cryptographic and hash algorithms including but not limited to triple DES,AES, SHA, etc. Demonstrated experience in developing, analyzing, testing, and researching Public Key Infrastructures using X.509 certificates, symmetric and public key algorithms, hash functions and quantum cryptography.

Duties may include but are not limited to: Performs complex analysis, design, development, integration, testing and debugging cryptographic and hashing algorithms. Apply cryptography-based solutions to contemporary use cases such as evaluating for FIPS 140 compliance, electronic voting, smart grid, health care, and resource constrained environments including but not limited to smart meters, smart cards, and medical devices.

We have two positions: Intermediate Cryptographer (5yrs exp) and Senior Cryptographer (10+ years exp)

05:41 [Event][New] NPSec 2012: 7th Workshop on Secure Network Protocols

  Submission: 2 July 2012
Notification: 31 August 2012
From October 30 to October 30
Location: Austin, TX, USA
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