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PHP Architect · Vol 24, Issue 6 · June 2025

Expanding Diffie-Hellman Key Exchange to Elliptic Curves

Last month, we explored the fundamentals of traditional Diffie-Hellman Key Exchange (DHKE) using modular exponentiation. Building on that approach, we'll now look at a more modern variant: Elliptic Curve Diffie-Hellman (ECDH). The core concept remains the same: two parties generating a shared secret without transmitting it - the underlying math shifts from modular arithmetic to operations on elliptic curves.

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