An advantage of key-dependent S-boxes is that because they are not fixed,it is impossible to analyze the S-boxes ahead of time to look for weaknesses.
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Q1: All other things being equal,smaller block sizes
Q3: Greater complexity in the subkey generation algorithm
Q4: DES exhibits the classic _ block cipher
Q5: A prime concern with DES has been
Q6: _ is when each plaintext element or
Q7: A problem with the ideal block cipher
Q8: The Feistel cipher structure,based on Shannon's proposal
Q9: The vast majority of network based symmetric
Q10: Fast software encryption/decryption and ease of analysis
Q11: A _ cipher is one that encrypts
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