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> A well-behaved app can have your password and do no harm.

Until someone steals its database.

You hash your user's passwords, right? Same thing - whether you're talking about your app's passwords, or some 3rd party app's passwords, keeping them around in plain text is a bad idea.

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And hashing them is not useful if you intend to authenticate with them. I think you mean encrypt. Hacker finds encryption key. See "Until someone steals its database."

No, that's not what I meant. It's an analogy - if sites shouldn't store their own passwords in plaintext or reversibly encrypted (which everyone here agrees on - "use BCrypt", etc), then they shouldn't store other passwords in plaintext or reversibly encrypted. They should use something like OAuth instead.

My bad, we agree on this. But there are a whole bunch of other great things that OAuth brings.

I must not have been very clear, because I'm being pro-OAuth here :)

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