Is your key quantum-safe?

Drop or paste an SSH or PEM public key and I'll tell you whether it survives a quantum computer. Classical keys (RSA, DSA, ECDSA, Ed25519) fall to Shor's algorithm — for those I'll generate the Qiskit code that demonstrates the attack.

🔒 Your key never leaves your browser until a quick local scan confirms it isn't a private key. I only ever upload public keys, and I don't store them.

Drop a .pub key here,click to browse or paste it below.

No key handy? Try a deliberately tiny but real RSA key. Small enough that the Qiskit script I generate factors it on a simulator today and writes out the matching private key:

  • RSA-4 · N = 3 × 5 factored in under a second
    download .pub
  • RSA-5 · N = 3 × 7 ~30 s on a laptop simulator
    download .pub