These three ciphers can operate of ______ of plaintext and cipher text.
A. 128 bit blocks
B. 64 bit blocks
C. 256 bit blocks
D. 156 bit blocks
Answer:A
These three ciphers can operate of ______ of plaintext and cipher text.
A. 128 bit blocks B. 64 bit blocks C. 256 bit blocks D. 156 bit blocks
Explanation: The three ciphers – Triple-DES, IDEA and CAST can operate on 64 bit blocks of plain text and cipher text.