____________ciphers, changes the order in which the elements appear in the sequence to produce the ciphertext.

a.Monoalphabetic

b.DES

c.AES

d.Rail-Fence

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________________ to prove the source and integrity of the data unit (message) and protect against forgery

a.Steganography

b.Cryptanalysis

c.Cryptography

d.Digital Signature

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Which of the following public key distribution technique, broadcast the key to the large community?

a.Public announcement

b.Publicly available directory

c.Public-key authority

d.Public-key certificates

Which of the following is NOT the uses of public key cryptosystem?

a.Digital Signature

b.Key Exchange

c.Encryption and Decryption

d.Data Analysis

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Which of the following cipher implements Shannons S-P net concept?

a.Feistel

b.AES

c.OTP

d.Caesar

Which of the following retains authorship and integrity of distributed software programs?

a.Personal Certificates

b.Organization Certificate

c.Server Certificates

d.

Developer Certificates

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________________ ciphers process messages a bit or byte at a time when encrypting/decrypting.

a.Stream

b.Block

c.Asymmetric

d.Symmetric

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A change in one bit of the plaintext or one bit of the key should produce a change in many bits of the cipher text is known as ____________________ effect

a.Substitution

b.Avalanche

c.Digital

d.Transposition

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Cryptanalyst in ROP of Oman, trying all possible key option to find the plain text from the cipher text. This action is know is ____________________________

a.Cryptography

b.Steganography

c.Brute-force attack

d.Cryptanalytic attack