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It has backups but not web-based cross-device syncing like authy, which I think is good because the point of 2fa is to only have it with you and if it's available online it kinda defeats the purpose If you want it on multiple devices, you can just do what I do and just backup the file and put it on another device
I have not used any 2fa app before. I've read that if we lose the codes then we are locked out. So, people take offline backup of these codes. But, I've seen these apps refresh these codes every 30 seconds. So, how does this backup work then?
Essentially, there is a secret code which has some fancy math done to it with the time as part of that equation. Both sides have this secret and do this calculation, so when you put in a code (ex 123456) the server checks it against what it generated (123456). The reason for doing it this way is you don't have to share the secret code and you have to have access to the device at the exact time you are trying to login, making it harder to steal By backing up the codes, you are backing up the secret (or sometimes there are like 6 codes which always work, but those are special)
Thanks. This was very well explained.
I want to start doing this with my social accounts. What apps do you recommend I should use on my Android? I'd definitely want to backup these secret codes somewhere else, in case my phone is stolen or broken.
I use Ageis, which lets you export an encrypted file with all your codes