Cryptography

Encryption protocols

Encryption algorythms

Symmetric	Asymmetric
DES 3DES AES	DH (Diffie-Helman) RSA ECC (Elliptic-curve)

.     System-1                        System-2
#Encryption decryption
                      download
 [data encrypted]       ----->      [data decrypted]
- with public2 key                 - with private2 key

#Signing
 [data encrypted]       ----->      [data decrypted]
- with public2 key                 - with private2 key
- signed with private1 key         - verified signature with public1 key

#Note, where needed the public key exchange happen, eg. via CA distribution process or protocol initialisation etc.