Even though DEA uses 64-bit encryption, only ____ bits are effectively being used.
A)48
B)50
C)56
D)60

Question

Quizplus · Accepted Answer

The DEA algorithm uses a 64-bit encryption key. However, due to the key scheduling method used in the algorithm, only 56 of those bits are effectively being used for encryption. This is because the key is divided into 16 different subkeys, and the 8th, 16th, 24th, 32nd, 40th, 48th, 56th, and 64th bits of the original 64-bit key are used only for parity checking and are not included in the subkeys used for encryption. Therefore, only 56 bits are effectively used for encryption.

Even Though DEA Uses 64-Bit Encryption, Only ____ Bits Are