3 ms·
And of course double the compute for half the time = same cost (more or less). I would imagine the NSA has sunk enough into hardware to do this fairly cheaply p
by finnh 6y ago
And of course double the compute for half the time = same cost (more or less). I would imagine the NSA has sunk enough into hardware to do this fairly cheaply per-pass, and very quickly (hours not weeks).
- deleted 6y ago[deleted]
- tialaramex 6y agoCloud computing makes this true for everybody else too now, at least within a practical range. Now I can easily afford a multi-million dollar distributed compute facility... for a few hours, rented from Amazon. I'd be surprised if the NSA has a clear purpose for bulk colliding SHA-1. It's a pretty niche thing to want to do even compared to say, "cracking" DES. For MD5 we know such government agencies made some collisions to exploit various technologies that didn't stop trusting MD5 in a timely fashion, but it wasn't something they did a lot just one collision here or there as necessary. e.g. https://en.wikipedia.org/wiki/Flame_(malware) https://en.wikipedia.org/wiki/Flame_(malware)
- minhazm 6y agoThis isn't actually true in practice though. Most of the cloud providers have quota's on accounts and actually won't let you provision that many resources without getting the quota's increased, which you are unlikely to be able to do unless you're actually regularly spending that much money.
- rhacker 6y agoI do think it's amazing that we can now script out a million dollar data center, build up, tear down for just an hour of use (and just a fraction of the cost). And that's available to ordinary people (with a little budget obviously). Compare what we had 20 years ago. Mind blown.