Open Source Mobile Operating Systems Authentication Software
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Authentication Software for Mobile Operating Systems
Browse free open source Authentication software and projects for Mobile Operating Systems below. Use the toggles on the left to filter open source Authentication software by OS, license, language, programming language, and project status.
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andOTP
Open source two-factor authentication for Android
Open source two-factor authentication for Android. It implements Time-based One-time Passwords (TOTP) and HMAC-Based One-Time Passwords (HOTP). Simply scan the QR code and login with the generated 6-digit code. This project started out as a fork of the great OTP Authenticator app written by Bruno Bierbaumer, which has sadly been inactive since 2015. By now almost every aspect of the app has been changed/re-written so the fork status of the Github repository got detached upon user request. But all credit for the original version and for starting this project still goes to Bruno. -
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Proton Authenticator for Android
Official Android implementation of a modern two-factor authentication
Proton Authenticator for Android is Proton’s official Android implementation of a modern two-factor authentication (2FA) app, designed to generate secure, time-based one-time passwords (TOTPs) and support multi-account authentication workflows with strong privacy and encryption features. The app enables users to link 2FA tokens for their online accounts, scan QR codes, and generate rotating verification codes that enhance login security across services that support TOTP standards. Built with native Android tooling and following modern design conventions, it integrates with Android’s notifications and system UI while maintaining local encryption of stored secrets so that authentication tokens are never exposed in plaintext outside the device. It also supports backup and encrypted sync with the associated Proton account, helping users recover 2FA codes across devices — a feature that many standalone token generators lack without risking security trade-offs. -
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Aegis Authenticator
A free, secure and open source app for Android
Aegis Authenticator is a free and open-source two-factor authentication (2FA) app for Android that helps users secure their online accounts by generating cryptographic one-time passwords (OTPs) such as TOTP and HOTP codes. Unlike many proprietary MFA apps, Aegis is designed with user privacy and local control in mind, storing secrets only on the device in an encrypted vault protected by PIN or biometric unlock, and offering features like backups encrypted with a user-chosen passphrase. It supports importing accounts from QR codes, exporting encrypted backups for safe storage, and grouping or labeling tokens so managing dozens of accounts is simple. Aegis also offers options for custom token configuration, including changing issuer names, digits, and intervals, and includes a robust recovery mechanism in case a device is lost. It has a material design interface that makes navigation intuitive, and its open-source license ensures transparency. -
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2FAS Auth for Android
Source code for 2FAS Auth Android app
2FAS Auth for Android is the general Android authenticator client for the 2FAS open-source multi-factor authentication suite, designed to help users protect their online accounts with secure, rotating one-time passwords and optionally manage related vault entries. This client lets users add and view TOTP and HOTP tokens for countless services, restore and backup token sets across devices, and secure the app with passcodes or biometrics. The Android implementation emphasizes straightforward setup and usage, providing an incremental list of codes that update in real time, quick token management, and compatibility with common OTP QR codes. It also supports sync and optional integration with 2FAS browser extensions to autofill or streamline authentication workflows when signing in to services across devices. -
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StrongKey FIDO Server (SKFS)
FIDO® Certified StrongKey FIDO Server (SKFS)
An open source implementation of the FIDO2 protocol to support passwordless strong authentication using public-key cryptography. Supports registration, authentication (all platforms), and transaction authorization (for native Android apps). -
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UnboundID LDAP SDK for Java
A Java-based LDAP API
A fast, comprehensive, and easy-to-use Java API for communicating with LDAP directory servers and performing related tasks like reading and writing LDIF, encoding and decoding data using base64 and ASN.1 BER, and performing secure communication. -
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2FAS Auth for iOS
Source code for 2FAS Auth iOS app
2FAS Auth for iOS is the official iPhone and iPad client for the 2FAS authentication platform, offering users a secure and privacy-focused mobile app to manage multi-factor authentication (MFA) tokens for their online accounts. The app generates time-based one-time passwords (TOTP) and counter-based one-time passwords (HOTP) that are widely required for logging into services with enhanced security, and it lets users scan QR codes or manually enter secret keys to register new accounts. Designed with native iOS conventions, it supports Face ID and Touch ID to quickly unlock the app while keeping authentication secrets encrypted locally on the device, so sensitive data never leaves the user’s control. The client is also structured to work offline, meaning you can generate codes without a network connection, and it integrates with companion browser extensions or other 2FAS sync tools so tokens can be backed up or restored across devices securely. -
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Bluetooth Personal Area Network client (PAN) with Support for RADIUS / Bluetooth Network Access Server (Point) (NAS / NAP) with Radius AAA. Project is supported by Nokia. Target BT stacks MS, Widcomm, BlueZ, Affix Blu(etooth) S(ymbian) PAN
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NativeScript Fingerprint Authentication
Forget passwords, use a fingerprint scanner or facial recognition
The nativescript-fingerprint-auth plugin enables biometric authentication in NativeScript applications, allowing users to authenticate using fingerprint or facial recognition, enhancing security and user convenience. -
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PDApass is a one time password authentication system, designed using a Palm Pilot as a password generator, with a PAM module to allow there server to perform the authentication.
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Proton Authenticator for iPhone
iOS client for Proton Authenticator
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. -
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Raivo OTP
A native, lightweight and secure one-time-password (OTP) client
Raivo OTP’s iOS application is a native, secure, and user-friendly two-factor authentication (2FA) client that generates time-based (TOTP) and counter-based (HOTP) one-time passwords to protect accounts, all built specifically for iOS devices using modern Swift. It helps users replace or supplement traditional SMS or email 2FA by securely storing OTP secrets and displaying rotating codes that can be synced via iCloud across Apple devices, reducing the risk of losing access when switching devices. Users can easily add new accounts by scanning QR codes or entering secrets manually, assign custom icons for better visual organization, and quickly search through stored tokens to find the one they need. The app includes optional biometric unlocking with Face ID or Touch ID so access to sensitive OTPs remains both fast and secure. It also supports encrypted backups and exports, letting users archive their data safely offline or transfer it between devices. -
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Satellizer
Token-based AngularJS authentication
Satellizer is a simple to use, end-to-end, token-based authentication module for AngularJS with built-in support for Google, Facebook, LinkedIn, Twitter, Instagram, GitHub, Bitbucket, Yahoo, Twitch, Microsoft (Windows Live) OAuth providers, as well as Email and Password sign-in. However, you are not limited to the sign-in options above, in fact you can add any OAuth 1.0 or OAuth 2.0 provider by passing provider-specific information in the app config block. With any Cordova mobile apps or any framework that uses Cordova, such as Ionic Framework, you will need to add cordova-plugin-inappbrowser plugin. Make sure that inAppBrowser is listed in your project. Authorization (obtaining user's information with their permission) and authentication (application sign-in) requires sever-side implementation. -
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SikkerBox
SikkerBox is a secure two-factor authentication (2FA) application, etc
SikkerBox is a comprehensive security and network utility application designed to provide users with essential security tools and network diagnostics in one convenient package. Key Features Two-Factor Authentication (2FA) Network Diagnostic Tools Port Checker: Verify if specific ports are open or closed on any IP address, provides a list of commonly used ports for quick one-click selection. IP Location Lookup: Determine the geographical location of any IP address, includes the function of automatically obtaining the user’s public IP WiFi Scanner: Analyze nearby WiFi networks, including signal strength, channels, and security information Ping Diagnostic: Test connectivity to domains or IP addresses Whois Lookup: Query registration information for any domain name DNS Reverse Lookup: Find hostnames associated with IP addresses More features：Stay tuned for more features -
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libeap is an open-source library for portable and modularized EAP(RFC2284: Extensible Authentication Protocol) support. The library provides a basic EAP packet controling, session handling and abstact layer to backend authentication methods.
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