What user data is processed during passkey authentication?

Passkey authentication is designed to minimize the use of sensitive user data, ensuring privacy and security. Understanding what data is processed during passkey creation and login helps organizations comply with privacy regulations while maintaining user trust.

1. Email Address (Optional):

   • Used temporarily to identify the user during account linking.
   • Not stored permanently in privacy-conscious implementations.

2. Public Key:

   • Generated on the user’s device and sent to the server for storage.
   • This key is not sensitive as it cannot be used to reconstruct private information.

3. Device Information: Metadata such as device type or operating system may be processed to ensure compatibility and enhance security.

1. Credential Identifier: A unique identifier associated with the user’s passkey, used to retrieve the correct public key for verification.

2. Challenge Response:

   • A cryptographic signature generated by the user’s device to prove possession of the private key.
   • This ensures authentication without exposing sensitive data.

3. Optional PII (For Account Recovery): Some implementations may process temporary PII like email to identify user accounts, especially during recovery scenarios.

• No Permanent PII Storage: Passkey systems can operate without storing sensitive data permanently.
• Encryption: All data transmitted during authentication is encrypted to prevent interception.
• Data Minimization: Only the minimum required data is processed, adhering to privacy-by-design principles.

Passkey systems prioritize privacy by minimizing the data processed during authentication. Key information like public keys and challenge responses are secure by design, while temporary PII use is strictly controlled. This approach ensures both compliance with privacy regulations and enhanced security for users.