I just got an email from Google letting me know that some passwords I saved in Chrome were leaked in a third party breach.

Luckily, I had changed the passwords for KeePassXC long ago.

Does it mean that Google keeps my passwords in plaintext though?

@alxd

Either that, or they obtained the list of exposed passwords, hashed them with whatever hashing method they use, then compare hashes against the ones that you've got saved.

A match=Compromised password.

That's how I'd do it if I were trying to protect my users without infringing on their privacy.

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@GigaByte4711 Yeah, but Google Password Manager can show you your decrypted passwords online, even if they didn't leak. Google can decrypt them on their own server, that's the problem.

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@alxd @GigaByte4711 look at it this way: you have no way of ascertaining they cannot.

So it's best to assume whatever you hand to such a service is not controlled by you anymore.

@fedops @alxd

"So it's best to assume whatever you hand to such a service is not controlled by you anymore."

Agreed.

I'm not sure how google hashes/encrypts those passwords, but obviously its not a one-way method. I reckon there's a chance that they use your google password (or another auth token) to encrypt your plaintext password, allowing you to decrypt it.

Again, we don't know, so we can't be sure.

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