Hash Functions and Information Theoretic Security

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概要

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• Information theoretic security is an important security notion in cryptography as it provides a true lower bound for attack complexities. However, in practice attacks often have a higher cost than the information theoretic bound. In this paper we study the relationship between information theoretic attack costs and real costs. We show that in the information theoretic model, many well-known and commonly used hash functions such as MD5 and SHA-256 fail to be preimage resistant.

著者

• BAGHERI Nasour

  Electrical Engineering Department of Iran University of Science and Technology

• KNUDSEN Lars

  Department of Mathematics of Technical University of Denmark

• NADERI Majid

  Electrical Engineering Department of Iran University of Science and Technology

• THOMSEN Søren

  Department of Mathematics of Technical University of Denmark

関連論文

• Hash Functions and Information Theoretic Security
• Hash Functions and Information Theoretic Security
• EPC : A Provably Secure Permutation Based Compression Function

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