Passkeys offer security improvements over passwords but have adoption and sharing limitations

Passkeys vs. Passwords: Core Functionality

Traditional passwords rely on a secret text string that is hashed and stored by websites. When a user logs in, the entered password's hash is compared against the stored hash for authentication. This method is vulnerable to data breaches if hashes are compromised.

Passkeys operate differently, utilizing a public key stored by the website and a private key held securely on the user's device. Authentication occurs when the website requests confirmation via the device's passkey, often using biometrics like Face ID or fingerprint scanning, or a device PIN.

Security and User Experience Benefits

Passkeys enhance security by removing the need for users to remember complex passwords, which are often weak or reused. The cryptographic nature of passkeys makes them resistant to phishing and credential stuffing attacks, as the private key never leaves the user's device.

For users, passkeys simplify the login process by replacing manual password entry with a quick biometric scan or device PIN, improving convenience and reducing login friction.

Current Limitations and Challenges

Despite their advantages, passkeys face limitations in widespread adoption and usability. They are not yet supported across all websites and online services, requiring users to still rely on passwords for many accounts.

Challenges also exist in managing passkeys across multiple devices and sharing them. Unlike passwords, which can be easily shared as text, passkeys are tied to specific devices or software, making sharing more complex and potentially limiting access if a device is lost or inaccessible.

Storage and Management

Passkeys are stored in secure enclaves on devices or within supported password managers. Major operating systems and password managers are increasingly integrating support for passkey storage and synchronization. Users must ensure their passkeys are backed up or accessible across their ecosystem to avoid lockout scenarios.