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computer science

In ___________ cryptography same secret key is used by the sender and the receiver. 

A

Public key

B

Private key

C

Symmetric key

D

Asymmetric key

Answer

Correct option is
C

Symmetric key

In Symmetric key cryptography same secret key is used by the sender and the receiver.

symmetric-key cryptography. An encryption system in which the sender and receiver of a message share a single, common key that is used to encrypt and decrypt the message. Contrast this with public-key cryptology, which utilizes two keys - a public key to encrypt messages and a private key to decrypt them.

Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both encryption of plaintext and decryption of ciphertext. ... The keys, in practice, represent a shared secret between two or more parties that can be used to maintain a private information link.

The shared secret is either shared beforehand between the communicating parties, in which case it can also be called a pre-shared key, or it is created at the start of the communication session by using a key-agreement protocol, for instance using public-key cryptography such as Diffie-Hellman or using symmetric-key.

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Key wrapping keys are also known as key encrypting keys. Symmetric and asymmetric random number generation keys. These are keys used to generate random numbers. Symmetric master key.

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