Module elliptic_curve::source ·
Elliptic Curve Diffie-Hellman Support.
This module contains a generic ECDH implementation which is usable with
any elliptic curve which implements the
CurveArithmetic trait (presently
ECDH Ephemeral (ECDHE) Usage
Ephemeral Diffie-Hellman provides a one-time key exchange between two peers using a randomly generated set of keys for each exchange.
In practice ECDHE is used as part of an Authenticated Key Exchange (AKE) protocol (e.g. SIGMA), where an existing cryptographic trust relationship can be used to determine the authenticity of the ephemeral keys, such as a digital signature. Without such an additional step, ECDHE is insecure! (see security warning below)
See the documentation for the
EphemeralSecret type for more information
on performing ECDH ephemeral key exchanges.
Static ECDH Usage
Static ECDH key exchanges are supported via the low-level
- Ephemeral Diffie-Hellman Secret.
- Shared secret value computed via ECDH key agreement.
- Low-level Elliptic Curve Diffie-Hellman (ECDH) function.