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Can you share maybe the code you're using to do that?

As well: rotating the secret token every night could probably be used to discard all existing cookies, right? (although this is a bit brute force and will kick out anyone currently using the app).

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Nope. The last version I wrote is buried in a rails app at a company I no longer work for.

It's a three or four line before filter in the application controller. I reimplement it every time since it's relatively simple.

I don't have it on any public code since it's also the last thing I implement before launching.

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