andOTP is a two-factor authentication App for Android 5.1+.
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!
I currently don't have that much time to spend developing andOTP, so any contributions are always welcome. Don't worry, I will still continue to develop andOTP it will just slow down from the incredible speed I had going in the beginning.
To keep your account information as secure as possible andOTP only stores it in encrypted data files. A part of the encryption key used for that is stored in the Android KeyStore system. The advantage of this approach is that the key is kept separate from the apps data and, as a bonus, can be backed by hardware cryptography (if your device supports this).
However, due to that separation, backups with 3rd-party apps like Titanium Backup can not be used with andOTP. Such apps only backup the encrypted data files and not the encryption key, which renders them useless.
Please only use the internal backup functions provided by andOTP to backup your accounts! Everything else WILL result in data loss.
Check out this wiki page to learn about the different ways to migrate to andOTP from other 2FA apps.
Warning: All three versions (Google Play, F-Droid and the APKs) are not compatible (not signed by the same key)! You will have to uninstall one to install the other, which will delete all your data. So make sure you have a current backup before switching!
If you want to show your appreciation for our work with a small donation you can do so using the following links:
Copyright (C) 2017-2020 Jakob Nixdorf <[email protected]>
Copyright (C) 2015 Bruno Bierbaumer
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