Forward Secrecy & Ephemeral Key Exchange
Understand PFS, DHE vs ECDHE, and why ephemeral keys matter.
Welcome
Forward secrecy ensures that even if long-term keys are compromised, past sessions remain secure. It is now required by most security standards.
What Is Forward Secrecy?
Perfect Forward Secrecy (PFS): compromise of long-term keys does NOT allow decryption of previously recorded traffic. Each session uses fresh ephemeral keys that are destroyed after use.
All lessons in this course
- The Key Distribution Problem
- Diffie-Hellman Key Exchange Math
- ECDH: Elliptic Curves for Key Exchange
- Forward Secrecy & Ephemeral Key Exchange