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The key also contains a

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The key also contains a

(a) Plaintext

(b) Ciphertext

(c) Plaintext & Ciphertext

(d) None of the mentioned

I have been asked this question in an interview for job.

I need to ask this question from Cipher Systems and Secrecy of Cipher Systems topic in division Spread Spectrum Techniques of Digital Communications

1 Answer

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The correct answer is (c) Plaintext & Ciphertext

The explanation: The key is supplied along with a plaintext message for encryption and cipher text message for decryption.

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