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2. Improved impossible differential cryptanalysis of Rijndael and Crypton;Cheon,2001
3. National Institute of Standards and Technology (NIST), Draft FIPS for the AES, 2001
4. Generalised impossible Differentials of Advanced Encryption standard;Phan;Electronics Letters,2001
5. Classes of impossible Differentials of Advanced Encryption standard;Phan;Electronics Letters,2002