Overview#

Elliptic Curve Diffie-Hellman (ECDH) is an anonymous Key-Exchange protocol that allows two parties, each having an Elliptic Curve Public Key–Private Key pair, to establish a Shared Secret over an insecure channel.

This Shared Secret may be directly used as a key, or to derive another key. The key, or the derived key, can then be used to encrypt subsequent communications using a Symmetric Key cipher.

Elliptic Curve Diffie-Hellman is a variant of the Diffie-Hellman key-exchange protocol using Elliptic Curve cryptography.

More Information#

There might be more information for this subject on one of the following:

• Curve25519
• Curve448
• ECDH
• Elliptic Curve
• RFC 8037