🔐 WebAuthn PRF - Deterministic Asymmetric Encryption

            ✓ TRUE DETERMINISTIC KEYPAIRS

            Uses ECDH (P-256) derived directly from PRF output.

            Same passkey + same salt = same keypair on ALL devices!

Works with: Face ID, Touch ID, Windows Hello, or hardware keys (YubiKey 5+)

Step 1: Register Credential with PRF

Step 2: Derive Deterministic Keypair

Salt (same salt = same keypair):

Step 3: Your Public Key (Share This!)

This public key is deterministic - same on all your devices with the same passkey!

Step 4: Encrypt Message

Message to encrypt: Recipient's Public Key:

Step 5: Decrypt Message

Encrypted Message: