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ECDH Key Exchange

v1.0.2

Demonstrate Elliptic-Curve Diffie–Hellman key agreement with NIST curves and HKDF key derivation

Browser-based Ecdh Exchange. All operations run locally — no data is sent to a server.

How to use
  • →Enter your input data and configure the operation settings.
  • →Click Run to compute the result.
  • →Use the Copy button to copy the output.
  • →Try a preset from the example picker to see sample input.
ECDH key agreement with HKDF-SHA256 derivation — all processing runs locally in your browser
Alice (Party A)
Public Key
No key generated yet
Private Key
No key generated yet
Bob (Party B)
Public Key
No key generated yet
Private Key
No key generated yet
Alice (Party A)Bob (Party B)
Bob (Party B)Alice (Party A)
Curve: P-256Key Size: 256 bits