Symmetric Encryption: Stream Ciphers

Question 1

Explain how a stream cipher works…

Answer 1

An encryption process in which a key encrypts information one byte at a time. The key is fed into a pseudorandom generator. This outputs a key-stream. The key-stream is XORd with the plain text one byte at a time.

Question 2

What operation if performed to encrypt and decrypt the data in stream ciphers?

Answer 2

XOR