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Dive into the research topics where Jürgen Pulkus is active.

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Featured researches published by Jürgen Pulkus.


cryptographic hardware and embedded systems | 2004

Switching Blindings with a View Towards IDEA

Olaf Neiße; Jürgen Pulkus

Cryptographic algorithms implemented on smart-cards must be protected against side-channel attacks. Some encryption schemes and hash functions like IDEA, RC6, MD5, SHA-1 alternate various arithmetic and boolean operations, each of them requiring a different kind of blinding. Hence the maskings have to be changed frequently. How to switch reasonably between standard arithmetic masking and boolean masking was shown in [2], [3], [5] and [9].


cryptographic hardware and embedded systems | 2016

Reducing the Number of Non-linear Multiplications in Masking Schemes

Jürgen Pulkus; Srinivas Vivek

In recent years, methods to securely mask S-boxes against side-channel attacks by representing them as polynomials over finite binary fields have become quite efficient. A good cost model for this is to count how many non-linear multiplications are needed. In this work we improve on the current state-of-the-art generic method published by Coron–Roy–Vivek at CHES 2014 by working over slightly larger fields than strictly needed. This leads us, for example, to evaluate DES S-boxes with only 3 non-linear multiplications and, as a result, obtain \(25\,\%\) improvement in the running time for secure software implementations of DES when using three or more shares.


Archive | 2004

Transition between masked representations of a value during cryptographic calculations

Olaf Dr. Neisse; Jürgen Pulkus


Archive | 2005

Calculation of a masked value protected against spy out

Olaf Dr. Neisse; Jürgen Pulkus


Archive | 2012

Efficient prime-number check

Jürgen Pulkus


Archive | 2004

Masked result value calculating procedure, involves evaluating specific illustration at two positions for calculation of some entries and incorporating determined result values of illustration into calculation of entries of masked table

Olaf Dr. Neisse; Jürgen Pulkus


Archive | 2011

METHOD FOR ARBITRARY-PRECISION DIVISION OR MODULAR REDUCTION

Markus Bockes; Jürgen Pulkus


Archive | 2017

Hardened White Box Implementation 2

Hermann Drexler; Sven Bauer; Jürgen Pulkus


Archive | 2015

Side-channel-protected masking

Jürgen Pulkus


Archive | 2015

Speichereffiziente seitenkanalgeschützte Maskierung

Jürgen Pulkus

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Srinivas Vivek

University of Luxembourg

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