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> Waving away a problem via "the bad guys would need to think for more than one second" is not exactly reassuring.

The NSA are well resourced, but I doubt they have much more than a second spare for every internet user on the planet. So speaking as a relatively uninteresting person, I actually would find that somewhat reassuring. If you're a Person Of Interest, that's obviously a very different situation, and you shouldn't use browser-based crypto.

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You're right to point out the difference between targeted and general attacks, but you're also misrepresenting the problem. An attack on SSL can take quite awhile to research and implement, but then can be used widely. One would expect the exact same scenario to play out with any javascript crypto library, as it does with all software.

So, yeah - if you rolled your very own library that's unique to this planet for exactly one website, congratulations! You're secure as long as there are no attackers! Doesn't really say anything useful about your security though. Or about the viability of using a fundamentally broken crypto platform to do crypto.

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