Question

for authentication using public key cryptography,encryption is carried out using

Answer 1

Answer:

Sender's private key

Explanation:

For authentication EA is done by sender's private key & DA is done by sender's public key

Answer 2

Answer:

Encryption is carried out using Public key cryptography (PKC) for authentication

Public key cryptography (PKC) is an encryption technique that uses a paired public and private key (or asymmetric key) algorithm for secure data communication. A message sender uses a recipient's public key to encrypt a message.

Explanation:

Public key cryptograph

Public key cryptography involves a pair of keys which is known as a public key and a private key (a public key pair), which are associated with an entity which needs to authenticate its identity electronically or to sign or encrypt data.

A PKI combines public key cryptography with digital certificates to create a secure environment where network traffic such as authentication packets can travel safely. Public keys and private keys always come in pairs. If the public key is used to encrypt data, only the matching private key can decrypt it.