Question

What requirements must a public key cryptosystems fulfill to be a secure system?

Answer 1

Two of the best-known uses of public key cryptography are:

=>Public key encryption, in which a message is encrypted with a recipient's public key.

=>Digital signatures, in which a message is signed with the sender's private key and can be verified by anyone who has access to the sender's public key.

Answer 2

What requirements must a public key cryptosystems fulfill to be a secure system?

$\huge\mathfrak{Answer}$

•Public key encryptions

•Digital signatures