Question

Assume we want to build a triple-AES (3AES) algorithm similar to

3DES. Explain what the block length of the 3AES algorithm is and
what are the minimum and maximum key sizes for this new cipher.

Answer 1

The block length of the 3AES algorithm is 128 bits, and the minimum and maximum key sizes are 192 bits and 256 bits, respectively. However, 3AES is not widely used and there may be security concerns.

Step-by-step explanation:

The block length of the 3AES algorithm is 128 bits, which means it operates on blocks of 128 bits of data at a time.

The minimum key size for 3AES is 192 bits, achieved by using three separate 64-bit keys, one for each round of encryption. The maximum key size is 256 bits, achieved by using three separate 128-bit keys.

It is important to note that 3AES is not a widely used encryption standard and has not been thoroughly analyzed for security. It is generally recommended to use established encryption algorithms like AES for secure communications.