Question

SSH uses ___________ to authenticate the remote computer.

(a) public-key cryptography

(b) private-key cryptography

(c) any of public-key or private-key

(d) both public-key & private-key

The question was asked in an online interview.

I would like to ask this question from SSH in chapter Application Layer of Computer Network

Answer 1

The correct answer is (a) public-key cryptography

For explanation I would say: Public encryption key is slower but more flexible. Every cryptographic security system requires a private key for private access and a public key for location.