Q. The number of rounds in RC5 can range from 0 to _____________

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Q. The standard/nominal version of the RC5-w/r/b has parameters w/r/b as

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Q. The total number of subkeys t used in the RC5 algorithm is given by the formula (r corresponds to number of rounds)

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Q. RC5 uses 2 magic constants to define their subkeys. These are

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Q. The value of the base of natural logarithms is

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Q. The value of the golden ratio is

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Q. Calculate the number of subkeys required in RC5 for 18 rounds of computation.

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Q. RC5 encryption uses Right shift and decryption uses Left shift.

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Q. “RC5 uses the Feistel Structure.”

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Q. Which one of the following is not a RC5 mode of operation?

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Q. Which RC5 mode will have the ciphertext longer than the plaintext by at most the size of a single RC5 block?

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Q. Which of these is not a characteristic of block ciphers?

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Q. Which one of the following RC4 algorithm not used in?

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Q. Till when was the RC4 algorithm kept a secret?

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Q. RC4 algorithm uses the concept of Block Cipher System.

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