Proton Authenticator for iPhone

Proton Authenticator for iOS is the official two-factor authentication client for iPhone and iPad, providing secure generation and management of TOTP codes for users’ online accounts while prioritizing privacy and encrypted secrets storage. Written in Swift with native iOS APIs, it supports scanning QR codes to add new authentication tokens, auto-sorting entries, and fast entry selection, all within a sleek, responsive iOS interface. The application encrypts secrets on the device and uses Proton’s encrypted sync service if enabled so that users can recover or replicate their authentication tokens across devices without compromising security. It integrates with iOS features like Face ID and Touch ID to protect access to the app and tokens, ensuring only authorized users can view or generate verification codes. The repository’s open-source nature helps security professionals and auditors inspect core logic related to cryptography and token workflow.