منابع مشابه
New Improvements of Davies-Murphy Cryptanalysis
In this paper, we revisit the famous Davies-Murphy cryptanalysis of DES. First we improve its complexity down to the analysis of 2 chosen plaintexts, by considering 6 distributions instead of 7. The previous improvement of the attack by Biham and Biryukov costed 2 known plaintexts. This new result is better than differential cryptanalysis but slightly worse than linear cryptanalysis. Secondly, ...
متن کاملBelinda Gray , Beverly Sara Muhlhausler , Peter Stephen Wynford Davies , Luis Vitetta
http://hdl.handle.net/2440/80695 PERMISSIONS http://www.elsevier.com/about/company-information/policies/sharing#preprint Preprint Authors can share their preprint anywhere at any time. If accepted for publication, we encourage authors to link from the preprint to their formal publication via its Digital Object Identifier (DOI). Millions of researchers have access to the formal publications ...
متن کاملClassic and new photometric systems
Many large photometric surveys are based on new or unusual systems. The users of the information they provide need to be aware of certain pitfalls. This paper outlines some of them. Very often the stated fiducal colours of stars in a given survey are based on modelling from theoretical atmospheres or spectrophotometry rather than actual observational data made with the same set of filters. Whil...
متن کاملTim Borer and Thomas Davies
Dirac is a hybrid motion-compensated codec that uses modern techniques such as wavelet transforms and arithmetic coding. It is an open technology which means that it is freely available and can be used without the payment of licence fees. Open technology is well suited to the business model of public service broadcasters as it allows open collaboration by those interested in its future developm...
متن کاملDefinable Davies’ Theorem
We prove the following descriptive set-theoretic analogue of a Theorem of R.O. Davies: Every Σ2 function f : R× R → R can be represented as a sum of rectangular Σ2 functions if and only if all reals are constructible.
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ژورنال
عنوان ژورنال: Tempo
سال: 2005
ISSN: 0040-2982,1478-2286
DOI: 10.1017/s0040298205260254