Based on your understanding of this module, Alice and Bob are interested in maintaining confidentiality. What keys should be used?

Question $1$ options:

a$)$

For encryption, use Alice's public key and for decryption use Bob's private key

b$)$

For encryption, use Alice's private key and for decryption use Bob's public key

c$)$

For encryption, use Bob's public key and for decryption use Bob's private key

d$)$

For encryption, use Bob's private key and for decryption use Alice's public key