Encryption & Security

What Is Perfect Forward Secrecy?

A property where every session uses a new key, so a leak does not expose past sessions.

With perfect forward secrecy, a new, temporary encryption key is generated for every connection session. So if a key is ever compromised in the future, it cannot be used to decrypt past sessions that have already ended.

Related Terms

Diffie-Hellman Key Exchange Encryption

See the full glossary

Protect Your Data With K1VPN

Strict no-logs policy, WireGuard® & OpenVPN®, 48-hour free trial.

See Plans