KeyAgreement algorithms

[TODO: ECDH, STS, SRP-3, MQV, etc.]

DH KeyAgreement
[[need more detail]]
Patent status:
The patent referenced above, although it only directly describes knapsack-based cryptosystems, was claimed to cover all public key cryptography. It expired in 1997.
Security comment:
DH key agreement on its own does not provide authentication of either party, and is therefore vulnerable to a man-in-the-middle attack.

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