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Explain about Message Authentication Code algorithm.?
In cryptography, a message authentication code, sometimes known as a tag, is a short piece of information used to authenticate a message—in other words, to confirm that the message came ... -
Explain RSA algorithm with example ?
RSA (Rivest–Shamir–Adleman) is an algorithm used by modern computers to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm. Asymmetric means that there are two different keys. This is also called public key ... -
Explain Diffie Hellman key exchange algorithm ?
Diffie–Hellman key exchange is a method of securely exchanging cryptographic keys over a public channel Purpose is to enable two users to securely exchange a key that can then be ... -
What is Cipher Feed Back mode (CFB)?
Ciphertext feedback (CFB) is a mode of operation for a block cipher. In contrast to the cipher block chaining (CBC) mode, which encrypts a set number of bits of plaintext at a time, it is at times ... -
Explain the concept of public key cryptography?
Public-key cryptography, or asymmetric cryptography, is a cryptographic system that uses pairs of keys: public keys, (which may be public to widely) , and private keys, (which will be known ... -
Describe the various components used for message integrity in cryptography ?
The types of functions that may be used to produce an authenticator may be grouped into three classes Hash function A function that maps a message of any length into ... -
Explain various digital signature schemes with suitable diagram?
A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature, where the prerequisites are satisfied, gives a recipient very strong ... -
Discuss the four types of transformations used by AES?
In AES, all operations are performed on 8-bit bytes. In particular, the arithmetic operations of addition, multiplication, and division are performed over the finite field GF(28 ). Section 5.6 discusses ... -
List out and explain the components of block ciphers in symmetric key encryption?
Block Cipher A block cipher is one in which a block of plaintext is treated as a whole and used to produce a ciphertext block. Typically, a block size of ... -
List out criteria of a cryptographic hash function ?
A hash function H accepts a variable-length block of data M as input and produces a fixed-size hash value as output h = H(M) Principal objective of hash function is ...