Online Tools

PSA Key Calculator

Calculate the PSA-style unlock response from any 4-byte seed and 2-byte PIN, or work backwards from a response to discover which PIN generated it. Same crypto, new surface.

Seed + PIN

Paste the seed from the ECU and the 2-byte app PIN to recreate the unlock key instantly.

Calculated Response

Run the calculator to see the 4-byte unlock response and both intermediate words.

Find the PIN

Already captured the unlock response? Pair it with the same seed to brute-force the 2-byte PIN.

Submit a lookup to reveal every PIN that reproduces the response.

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