Q. A symmetric cipher system has an IC of 0.041. What is the length of the key ‘m’?

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Q. In public key cryptosystem _____ keys are used for encryption and decryption.

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Q. In public key cryptosystem which is kept as public?

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Q. In a trapdoor function, the functions are easy to go in

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Q. Pretty good privacy program is used for

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Q. PGP system uses

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Q. Private key algorithm is used for _____ encryption and public key algorithm is used for _____ encryption.

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Q. Which are called the block ciphers?

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Q. Which has a key length of 128 bits?

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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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