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Cryptography

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  • $\begingroup$ Ok, thanks! So if I assume that SipHash is 15 times faster than SHA-512, then finding a preimage for SipHash on a single 2GHz Intel Core 2 Duo will take 37 years, and on the Stanford supercomputer it will take about a week. $\endgroup$ Commented Aug 14, 2015 at 20:04
  • 1
    $\begingroup$ @Chris, replace 37 with 37k = 37000 then yes. However I think that this may be feasible if an attacker is well-funded assuming you can indeed get a significant speed-up by using ASM, modern processors and more cores (something like 10 servers with a full set of 8 Xeon E7 8890v3 equipped, hint: this is 1440 physical cores for a mere $560k) - Or by simply directly using FPGAs and ASICs for this pupose... (but you could build up your own small EC2 with such computing power ;) $\endgroup$ Commented Aug 14, 2015 at 20:11
  • $\begingroup$ I think if I buy 10000 servers I'll get a reduction on the price. :) $\endgroup$ Commented Aug 14, 2015 at 20:33