Question: (Stream Cipher Security) Prove that Stream Ciphers are Semantically Secure if the pseudorandom number generator PRG is secure. [hint: yes, it is similar to the

(Stream Cipher Security) Prove that Stream Ciphers are Semantically Secure if the pseudorandom number generator PRG is secure. [hint: yes, it is similar to the example we show in the class. The goal is trying to understand more. You may also refer to the textbook]

Thm: G:K {0,1}n is a secure PRG stream cipher E derived from G is sem. sec.

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