H. Soleimany
Cyberspace Research Institute Shahid Beheshti University, G.C. Tehran, Iran
[ 1 ] - Impossible Differential Cryptanalysis on Deoxys-BC-256
Deoxys is a final-round candidate of the CAESAR competition. Deoxys is built upon an internal tweakable block cipher Deoxys-BC, where in addition to the plaintext and key, it takes an extra non-secret input called a tweak. This paper presents the first impossible differential cryptanalysis of Deoxys-BC-256 which is used in Deoxys as an internal tweakable block cipher. First, we find a 4.5-round...
[ 2 ] - رویکردها و چالش‌های مدل جعبه سفید در پیادهسازی الگوریتم‌های رمزنگاری قالبی
با رشد فناوری و گسترش ابزارهای نرمافزاری و سختافزاری، حملات علیه رمزهای قالبی جنبههای جدیدی یافته است. در بسیاری از موارد، مهاجمان به جای تلاش برای انجام حملات تحلیل نظری و محاسباتی، از نقاط ضعف موجود در نحوه پیادهسازی رمزهای قالبی استفاده میکنند. هر چقدر میزان دسترسی مهاجمان به جزئیات پیادهسازی رمزهای قالبی بیشتر باشد، شانس حملات موفق افزایش مییابد. بنابراین، طراحی و ارائه روشهایی برای...
[ 3 ] - Investigating Methods of Kleptography
Due to the fast development in information and communication technology, new challenging problems appear in the security. So, it is important and vital that the scientific society of our country focuses on research and studies these problems and by providing new proposal try to respond to these critical needs of our country. Hence, our aim in this paper is to study and highlight one of the impo...
[ 4 ] - Novel Impossible Differential Cryptanalysis of Zorro Block Cipher
Impossible difference attack is a powerful tool for evaluating the security of block ciphers based on finding a differential characteristic with the probability of exactly zero. The linear layer diffusion rate of a cipher plays a fundamental role in the security of the algorithm against the impossible difference attack. In this paper, we show an efficient method, which is independent of the qua...
[ 5 ] - Enhanced Flush+Reload Attack on AES
In cloud computing, multiple users can share the same physical machine that can potentially leak secret information, in particular when the memory de-duplication is enabled. Flush+Reload attack is a cache-based attack that makes use of resource sharing. T-table implementation of AES is commonly used in the crypto libraries like OpenSSL. Several Flush+Reload attacks on T-table implementat...
[ 6 ] - Threshold Implementation as a Countermeasure against Power Analysis Attacks
One of the usual ways to find sensitive data or secret parameters of cryptographic devices is to use their physical leakages. Power analysis is one of the attacks which lay in such a model. In comparison with other types of side-channels, power analysis is so efficient and has a high success rate. So it is important to provide a countermeasure against it. Different types of countermeasures use ...
[ 7 ] - An Introduction to Differential Computation Analysis (DCA) on the withe-box cryptography algorithms
Advances in information and communication technologies lead to use of some new devices such as smart phones. The new devices provide more advantages for the adversaries hence with respect to them, one can define with-box cryptography. In this new model of cryptography, designers try to hide the key using as a kind of implementation. The Differential Computation Analysis (DCA) is a side channel ...
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