Finding Bugs in Cryptographic Hash Function Implementations

Finding Bugs in Cryptographic Hash Function Implementations

Developing an approach to test cryptographic hash function implementations can be particularly difficult, and bugs can remain unnoticed for a very long time. We revisit the NIST SHA-3 hash function competition, and apply a new testing strategy to all available reference implementations. Motivated by the cryptographic properties that a hash function should satisfy, we develop four types of tests...

Hash Algorithms for Cryptographic Protocols: Fpga Implementations

SMASH - A Cryptographic Hash Function

1 This paper presents a new hash function design, which is different from the popular designs of the MD4-family. Seen in the light of recent attacks on MD4, MD5, SHA-0, SHA-1, and on RIPEMD, there is a need to consider other hash function design strategies. The paper presents also a concrete hash function design named SMASH. One version has a hash code of 256 bits and appears to be at least as ...

VLSI Implementations of the Cryptographic Hash Functions MD6 and ïrRUPT

A public competition organized by the NIST recently started, with the aim of identifying a new standard for cryptographic hashing (SHA-3). Besides a high security level, candidate algorithms should show good performance on various platforms. While an average performance on highend processors is generally not critical, implementability and flexibility in hardware is crucial, because the new stan...

New Way to Construct Cryptographic Hash Function

In this paper, a new way to construct cryptographic hash function is given. The cryptographic hash function is generalized to uncertain function which has various specific function forms. When computing hash value, the specific form of the function is determined by the message, but the codebreaker cannot know the message, and hence cannot know the specific form of random function. This provides...