Abstract
Decorrelated Fast Cipher(DFC) is a candidate for the Advanced Encryption Standard (AES). It is shown that the cryptographic properties of the confusion permutation of DFC are weak in this paper. With the same F-function of DFC, a Feistel cipher VDFC which has no resistance against differential cryptanalysis is constructed. This demonstrates the importance of the key addition into DFC sufficiently. As a result, DFC may not be qualified candidate for the AES.
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References
Serge Vaudenay, Decorrelated fast cipher, http://www.nist.gov/aes.
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Wu, W., Li, B., Feng, D. et al. On Decorrelated Fast Cipher. J. of Electron.(China) 17, 94–96 (2000). https://doi.org/10.1007/s11767-000-0028-6
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DOI: https://doi.org/10.1007/s11767-000-0028-6