Asymmetric – ephemeral keys

Ephemeral keys are short-lived keys that are used for a one-time only session. There are two types of Diffie Hellman: Ephemeral (DHE) and Elliptic Curve Diffie Hellman Ephemeral (ECDHE). The other keys, used for other asymmetric and symmetric encryption, are known as static keys, as they have about a two-year lifespan.

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