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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?
Correct Answer: A
Explanation/Reference: 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.