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Results tagged with aes
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user 64
AES (Advanced Encryption Standard) is a symmetrical block-cipher algorithm with a 128-bit block size, and key sizes of 128, 192 or 256 bits.
15
votes
Accepted
Replacing the Rijndael S-Box?
The AES S-box does have a design behind it, both in terms of the steps take to generate it and in terms of its structure with respect to linear/differential/algebraic attacks. …
- 8,717
10
votes
Why is MixColumns omitted from the last round of AES?
In a normal AES round, MixColumns precedes the AddRoundKey operation. However it is possible to swap the order of these operations. … Consider the AES variant where MixColumns is performed in the final round of encryption. …
- 8,717
3
votes
Encrypting a key with the same key, for instance using AES
Thus, you can stare at the details of AES all day long and never see the problem. … What you need to stare at instead are the details of why we think that AES is secure; or more specifically, why we think AES with certain modes of operation (e.g., CBC or CTR) has one of the most basic …
- 8,717