ECDHE
Elliptic Curve Diffie-Hellman Ephemeral
An ephemeral key exchange using elliptic curves for forward secrecy.
ECDHE is the elliptic curve form of Diffie-Hellman key exchange that generates a fresh, temporary key pair for each session. The ephemeral element provides perfect forward secrecy, meaning that compromise of a server long term private key cannot decrypt previously captured sessions. It is widely deployed in modern TLS cipher suites for this reason. The contrast for the exam is non ephemeral exchange, where a single static key compromise exposes all past traffic, and the related ECDH variant that lacks the per session freshness.
Looking ECDHE up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
Not affiliated with or endorsed by CompTIA.