Q. The trithemius cipher is a mono alphabetical cipher.

View solution

Q. In auto key method

View solution

Q. In Vigenere method ______ is provided.

View solution

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

View solution

Q. The conditions for perfect secrecy are

View solution

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

View solution

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

View solution

Q. When the key size is finite, equivocation approaches

View solution

Q. When a system is called as unbreakable?

View solution

Q. Which are called as substitution encryption techniques?

View solution

Q. In substitution technique encryption protection is more.

View solution

Q. The standard building block uses _______ of a key to transform 64-bit input into 64-bit output.

View solution

Q. The 64 bit block input key has _____ number of parity bits.

View solution

Q. One-time pad has

View solution

Q. Perfect secrecy can be achieved for

View solution

Q. The segment of the key-stream of plaintext is obtained by _____ of two sequences together.

View solution

Q. In which method the key-stream is generated independently of the message?

View solution

Q. In which method cipher feedback is used?

View solution

Q. Spread spectrum multiple access techniques allows the multiple signal to be transmitted

View solution

Q. In CDMA, the users share the bandwidth

View solution