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## What are authentication algorithms?

Authentication algorithms use a shared key to verify the authenticity of the IPsec devices. … MD5 can be used with authentication header (AH), Encapsulating Security Payload (ESP), and Internet Key Exchange (IKE). Secure Hash Algorithm 1 (SHA-1) uses a stronger algorithm than MD5.

## Which algorithm provides authentication integrity?

Digital Signature Algorithms

Digital signatures are used with hash functions to provide source authentication, integrity authentication, and support for non-repudiation. The Digital Signature Algorithm (DSA), RSA algorithm and ECDSA algorithm are approved by FIPS 186 for use in generating digital signatures.

## What is the role of key distribution center?

A key distribution center (KDC) is a component in an access control system responsible for servicing user requests to access resources by supplying access tickets and session keys.

## What are encryption algorithms?

An encryption algorithm is the method used to transform data into ciphertext. An algorithm will use the encryption key in order to alter the data in a predictable way, so that even though the encrypted data will appear random, it can be turned back into plaintext by using the decryption key.

## What is a MAC algorithm?

A MAC algorithm is a family of cryptographic functions – parameterized by a symmetric key – that can be used to provide data origin authentication, as well as data integrity, by producing a MAC tag on arbitrary data (the message).

## Which of the following algorithm is not used for an authentication?

Explanation: DES is a symmetric key block cipher in which the block size is 64 bits and the key size is 64 bits. It is vulnerable to some attacks and is hence not that popularly used.

## What are two hashing algorithms used with IPsec?

Authentication Algorithms

- SHA2-256 — produces a 265-bit (32 byte) message digest.
- SHA2-384 — produces a 384-bit (48 byte) message digest.
- SHA2-512 — produces a 512-bit (64 byte) message digest.

## What is cryptography authentication?

Definition: Authentication is the process of recognizing a user’s identity. … Identification phase provides a user identity to the security system. This identity is provided in the form of a user ID.

## What are the two main types of cryptography?

There are two main types of cryptography systems : symmetric (” private key “) and asymmetric ( ” public key ” ). Symmetric key system requires both the sender and the recipient to have the same key .

## Which algorithm is supported by PGP for authentication?

PGP provides authentication through the use of Digital Signature. It provides confidentiality through the use of symmetric block encryption. It provides compression by using the ZIP algorithm, and EMAIL compatibility using the radix-64 encoding scheme.

## What type of encryption algorithm is RSA?

RSA algorithm is asymmetric cryptography algorithm. Asymmetric actually means that it works on two different keys i.e. Public Key and Private Key. As the name describes that the Public Key is given to everyone and Private key is kept private.

## Which of the following algorithm is associated with digital signature?

The DSA algorithm is standard for digital signature, which is based on the algebraic properties of discrete logarithm problem and modular exponentiations and is based on the public-key cryptosystems principal.

## Which algorithm algorithm provides the private key and its corresponding public key?

Explanation: The key generation algorithm selects private key randomly from a set of possible private keys. This algorithm provides the private key and its corresponding public key.

## What is Triple DES algorithm?

In cryptography, Triple DES (3DES or TDES), officially the Triple Data Encryption Algorithm (TDEA or Triple DEA), is a symmetric-key block cipher, which applies the DES cipher algorithm three times to each data block.