Q. Super-Encipherment using two affine transformations results in another affine transformation.

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Q. If the key is 110100001, the output of the SP network for the plaintext: 101110001 is

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Q. If the key is 110100001 where,
If ki=0, then S_i (x)=((1 1 0 | 0 1 1 | 1 0 0 ))x+((1 1 1))
and If ki=1, then S_i (x)=((0 1 1 | 1 0 1 | 1 0 0))x+((0 1 1))
then the output of the SP network for the plaintext: 101110001 is

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Q. Confusion hides the relationship between the ciphertext and the plaintext.

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Q. The S-Box is used to provide confusion, as it is dependent on the unknown key.

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Q. Which of the following slows the cryptographic algorithm –

1) Increase in Number of rounds
2) Decrease in Block size
3) Decrease in Key Size
4) Increase in Sub key Generation

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Q. DES follows

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Q. The DES Algorithm Cipher System consists of ____________rounds (iterations) each with a round key

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Q. The DES algorithm has a key length of

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Q. In the DES algorithm, although the key size is 64 bits only 48bits are used for the encryption procedure, the rest are parity bits.

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Q. In the DES algorithm the round key is __________ bit and the Round Input is ____________bits.

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Q. In the DES algorithm the Round Input is 32 bits, which is expanded to 48 bits via ____________

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Q. The Initial Permutation table/matrix is of size

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Q. The number of unique substitution boxes in DES after the 48 bit XOR operation are

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Q. In the DES algorithm the 64 bit key input is shortened to 56 bits by ignoring every 4th bit.

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Q. During decryption, we use the Inverse Initial Permutation (IP-1) before the IP.

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Q. A preferable cryptographic algorithm should have a good avalanche effect.

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Q. The number of tests required to break the DES algorithm are

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Q. The number of tests required to break the Double DES algorithm are

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Q. How many keys does the Triple DES algorithm use?

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