Question

Which of the following is a secret-key Algorithm?

• A. RSA
• B. DES
• C. Public key
• D. None of these

Answer 1

The correct option is B DES

DES is a secret-key algorithm.

A secret key algorithm is a cryptographic algorithm that uses the same key to encrypt and decrypt data. In asymmetric encryption, two separate keys are used. One is a public key and the other is a secret key. A secret key may also be known as a private key.

The data encryption standard (DES) is a block cipher, meaning a cryptographic key and algorithm are applied to a block of data simultaneously rather than one bit at a time. To encrypt a plaintext message, DES groups it into 64-bit blocks.