Question: What is the difference between a block and a stream cipher? Stream ciphers operate on a predetermined number of bits; Block ciphers operate on a

What is the difference between a block and a stream cipher?
Stream ciphers operate on a predetermined number of bits; Block ciphers operate on a single bit at a time
Block ciphers operate on a predetermined number of bits at a time; stream ciphers operate on a single bit at a time
Stream ciphers can only be used once; block ciphers can be used multiple times
Block ciphers can only be used once; stream ciphers can be used multiple times

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