Cryptography

Symmetric encryption is also known as

• public key encryption

• Asymmetrickey encryption

• Conventional Encryption

• Hybrid encryption

Digital signature cannot provide following information

• Authentication

• Nonrepudiation

• Confidentiality

• integrity

Encryption is used primarilly with

• transition entry

• computer processing

• file retention

• data communication

which of the following process converts cipher text to plain text

• Hashing

• substitution

• Encryption

• Decryption

MD5 is widely used hash function for producing Hash value of

• 256 bits

• 128 bits

• 1024 bits

• 64 bits

What is the key size of Data encryption Algorithim used in cryptography

• 64 bits

• 128 bits

• 56 bits

• 1024 bits

In cryptography the order of letters in message is rearranged by

• transpositional cipher

• substitution cipher

• Both A and B

• None Above

What is Data encryption standard

• Block Cipher

• Stream Cipher

• Bit cipher

• None Above

cryptographic hash function takes an arbitrary block of data and returns

• fixed size bit string

• variable size bit string

• Both A and B

• None above

In asymmetric key cryptography private key is kept by

• Sender

• Receiver

• Both A and B

• All connected devices