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Collision Resistance of Hash Functions in a Weak Ideal Cipher Model
2012
IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences
This article discusses the provable security of blockcipher-based hash functions. It introduces a new model called a weak ideal cipher model. In this model, an adversary is allowed to make key-disclosure queries to the oracle as well as encryption and decryption queries. A key-disclosure query is a pair of a plaintext and a ciphertext, and the reply is a corresponding key. Thus, in this model, a block cipher is random but completely insecure as a block cipher. It is shown that collision
doi:10.1587/transfun.e95.a.252
fatcat:c22mqie2pzhu5gfa6d5o6wxvpi