Advanced Encryption Standard (AES) is a symmetric key cryptography algorithm.
- Key size is either 128, 192 or 256 bits
- Block size is either 128, 192 or 256 bits
As increasing the key length and block size adds a little extra compensation, i.e. increasing the number of iteration of the algorithm, it is recommended to pick 256 bits instead of 128 bits.
Reference: Official (ISC)2 Guide to the CISSP CBK, Second Edition ((ISC)2 Press)
electronic signature software
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