Diffie-Hellman Key Exchange Demo
Interactive demo of ECDH (P-256) key exchange showing how two parties derive the same shared secret without ever transmitting private keys. Everything runs in your browser.
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Alice
Public Key (hex)
Not generated yet
Shared Secret (256-bit)
Not derived yet
Bob
Public Key (hex)
Not generated yet
Shared Secret (256-bit)
Not derived yet
How it works
This demo uses ECDH on the P-256 curve via WebCrypto. Each party generates a key pair, exchanges public keys, and derives a shared 256-bit secret. The private keys never leave each party. In real protocols this shared secret is used to derive encryption keys.
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