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Key Exchange Method
Elliptic-curve Diffie–Hellman Ephemeral (ECDHE)
Ephemeral Elliptic-curve Diffie–Hellman is a variant of Elliptic-curve Diffie–Hellman key exchange that has forward secrecy, and does protect past sessions against future compromises. If long-term secret keys or passwords are compromised, encrypted communications and sessions recorded in the past cannot be retrieved and decrypted.
Always prefer cipher suites with PFS property over the non-PFS ones. Note that performance considerations implies preferring Ephemeral Elliptic-curve Diffie–Hellman over Ephemeral Diffie-Hellman.