Q. How many channels are transmitted in the forward and reverse direction?

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Q. Which channel is more robust?

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Q. Which serves the hard hand-off process?

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Q. Which serves the soft hand-off process?

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Q. Cryptosystems are used for

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Q. The key also contains a

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Q. The system which has insufficient information available to crypt-analyst is

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Q. Caesar cipher was a mono alphabetic cipher.

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Q. In Caesar cipher, each plain text is replaced by

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Q. The trithemius cipher is a mono alphabetical cipher.

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Q. In auto key method

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Q. In Vigenere method ______ is provided.

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Q. A cipher system is said to have perfect secrecy if

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Q. The conditions for perfect secrecy are

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Q. The _____ the uncertainty, the ______ is the information content.

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Q. The maximum number of message bits contained in each character is called as

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Q. When the key size is finite, equivocation approaches

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Q. When a system is called as unbreakable?

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Q. Which are called as substitution encryption techniques?

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Q. In substitution technique encryption protection is more.

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