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Given below are two statements:

Statement $I$: In Ceasar Cipher each letter of Plain text is replaced by another letter for encryption

Statement $II$: Diffie-Hellman algorithm is used for exchange of secret key

In the light of the above statements, choose the correct answer from the options given below

1. Both Statement $I$ and Statement $II$ are true
2. Both Statement $I$ and Statement $II$ are false
3. Statement $I$ is correct but Statement $II$ is false
4. Statement $I$ is incorrect but Statement $II$ is true

Ans is A  Both Statement I and Statement II are true

Ceasar Cipher In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipherCaesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.

Diffie Hellman (DH) key exchange algorithm is a method for securely exchanging cryptographic keys over a public communications channel. Keys are not actually exchanged – they are jointly derived.

https://en.wikipedia.org/wiki/Caesar_cipher

https://en.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange

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