Perfect Forward Secrecy
N/A
完美前向保密
Perfect Forward Secrecy · N/A · 完美前向保密 · PER-fikt FOR-wurd SEER-uh-see · PFS · forward secrecy · Cryptography · tls · privacy · keysCryptographyPFS forward secrecy/PER-fikt FOR-wurd SEER-uh-see/
Also known as: PFS, forward secrecy
Last updated August 9, 2026
Definition
Perfect forward secrecy ensures that past session keys cannot be decrypted even if the server’s long-term private key is later stolen.
Real-World Example
TLS with ephemeral Diffie-Hellman protecting yesterday’s HTTPS traffic after a future server key leak.
References
Related terms
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