Structural Evaluation of AES and Chosen-Key Distinguisher of 9-round AES-128

Provided by: Nanyang Technological University
Topic: Security
Format: PDF
Block ciphers and hash functions are among the most important primitives in cryptography and while their respective goals are different, they are related in many ways. While the symmetric-key cryptography community has now a good experience on how to build a secure and efficient fixed permutation, it remains an open problem how to design a key-schedule for block ciphers, as shown by the numerous candidates broken in the related-key model or in a hash function setting. Provable security against differential and linear cryptanalysis in the related-key scenario is an important step towards a better understanding of its construction.

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