We describe a new kind of attack based on a cancellation property in the round function. This new technique allows to efficiently use the degrees of freedom available to attack a hash function. Using the cancellation property, we can avoid the non-linear parts of the round function, at the ...
as shown in the current paper, they also form a potential threat for hash functions, namely for sponge-function like structures. As it turns out, certain constructions for hash-function-based MACs can be vulnerable to forgery and even to...
SM3 is an iterated hash function based on the Merkle-Damgrd design. It is a hash function used in applications such as the electronic certification service system in China. Our cryptanalysis is based on the Meet-in-the-Middle (MITM) attack. We utilize several techniques such as initial ...
and if you target a "simple" hash (like a single iteration of MD5), then this is very poor performance (the server alone, on its own CPU, can test many more passwords per second). This
We study the security of AES in the open-key setting by showing an analysis on hash function modes instantiating ABS including Davies-Meyer, Matyas-Meyer-Oseas, and Miyaguchi-Preneel modes. In particular, we propose preimage attacks on these constructions, while most of previous work focused their...
The first thing we need in order to approach this problem is to find out how the hash function f operates on input bits X to produce output bits Y without making any assumptions about X. To this end, I make the hash functions operate on symbolic bit vectors, i.e. SymBitVec objects....
The receiving device will accept it because it has the right hash. The name “birthday attack” refers to the birthday paradox, which is based on the fact that in a room of 23 people, there is more than a 50% chance that two of them have the same birthday. Hence, while people think...
On the Security of HMAC and NMAC Based on HAVAL, MD4, MD5, SHA-0 and SHA-1 HMAC is proved to be secure as long as the compression function of the underlying hash function is a pseudorandom function. In this paper we devise ... J Kim,A Biryukov,B Preneel,... - Springer, ...
the best being a preimage attack for the first 33 steps of the hash function with complexity 2124.5. In this work, we provide a new assessment of the security margin of RIPEMD-128 by showing attacks on up to 48 (out of 64) steps of the hash function. We present a collision attack red...
A new Hash Function Based on Combination of Existing Digest Algorithms Hash functions were introduced in cryptology as a tool to protect the authenticity of information. SHA-1, MD5, and RIPEMD are among the most commonly-used ... H Mirvaziri,K Jumari,M Ismail,... - IEEE 被引量: 18发表...