Titlebook: Cryptology and Network Security; 13th International C Dimitris Gritzalis,Aggelos Kiayias,Ioannis Askoxyl Conference proceedings 2014 Spring

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Assignment

,Christopher George Attenborough 1922–1979,analyze Cryptophia’s combiner and show that a collision can be found in two queries and a second preimage in one query, invalidating the claimed results. We additionally propose a way to fix the design in order to re-establish the original security results.

撫育

,William Morant Baker 1839–1896,of them successfully is in . while on random oracle hash function it is in .. We also show that it is possible to decrease the before mentioned expected value to . if the length of the original message is 2. and . is sufficiently large. Furthermore, we generalize these attacks to work against concatenated hash functions as well.

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