Q. Which algorithm can be used to sign a message?

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Q. Examples of hash functions are

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Q. A cryptographic hash function has variable output length.

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Q. A set of numbers is called as super increasing if

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Q. Knapsack problem can be solved by

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Q. Merkle hellman is a symmetric cryptosystem.

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Q. In Merkle Hellman method same key is used for encryption and decryption.

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Q. Cipher system can be solved effectively by statistically using

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Q. Encryption transformations are known as

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Q. For n input bits the number of substitution patterns are

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Q. In transposition, the plaintext letters are

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Q. The substitution of the letters are done

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Q. In cipher feedback method, encryption is done on

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Q. In stream encryption, the key sequence repeats itself.

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Q. In which method, key-stream is generated independently?

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Q. Synchronous ciphers uses

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Q. Public key cryptosystem uses same key for both encryption and decryption.

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Q. Which should be kept as a secret in public key cryptosystem?

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Q. Public key cryptosystem is also known as

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Q. Euler’s totient function is determined by

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