A network stream needs to be encrypted. Sara, the network administrator, has selected a cipher
which will encrypt 8 bits at a time before sending the data across the network. Which of the
following has Sara selected?
A.
Block cipher
B.
Stream cipher
C.
CRC
D.
Hashing algorithm
Explanation:
With a block cipher the algorithm works on chunks of data—encrypting one and then moving to the
next.
Example: Blowfish is an encryption system that performs a 64-bit block cipher at very fast speeds.
Stream. If it encrypted 8 bytes at a time, then it would be block.
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