CRYPTOGRAPHY AND NETWORK SECURITY - ENCRYPTION TECHNIQUES MCQ

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In transposition, the plaintext letters are
The substitution of the letters are done
In cipher feedback method, encryption is done on
In stream encryption, the key sequence repeats itself
In which method, key-stream is generated independently?
Synchronous ciphers uses
Public key cryptosystem uses same key for both encryption and decryption
Which should be kept as a secret in public key cryptosystem?
Public key cryptosystem is also known as
Euler’s totient function is determined by
Pretty good privacy (PGP) security system uses
Public key cryptosystem is used for the encryption of
For digital signatures private key cryptosystem is used
Data compression includes
PGP offers _____ block ciphers for message encryption
Which block cipher has key length of 128 bits?
These three ciphers can operate of ______ of plaintext and cipher text
The key size of DES is
Which operation is used in encryption using IDEA?
What is the key size allowed in PGP?

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