Understanding Passkeys and Passwordless Login

Passkeys are a modern, phishing‑resistant way to authenticate without a password. They use public‑key cryptography and hardware or biometric authenticators to prove your identity. When you register a passkey with Gopnik Wallet, your device stores a private key and the server stores a public key. During login, the server sends a challenge that can only be answered using the private key on your device. Passkeys eliminate the need to remember or enter passwords and cannot be reused on other sites. We recommend registering at least one cross‑platform security key as a backup in addition to platform passkeys on your phone or computer.