Simple to understand private and public keys

Symmetric (shared key)

Asymmetric (public keys)

Digital signatures and encryption:

Encryption system: a public key encryption, the private key to decrypt

Signature system: private key encryption, public key to decrypt

 

Data p - >>  

A {private (signature) of A -> B's public key (encrypted)}

-->>

The private key of B {B (decryption) -> public key (authentication) of A}

-->>p

 

http://www.youdzone.com/signature.html