On Aug 17, 2014, at 4:27 PM, Yoav Nir <ynir.i...@gmail.com> wrote: > > On Aug 16, 2014, at 12:48 PM, Les Leposo <lep...@gmail.com> wrote: > >> Hi >> >> some points of discussion below. >> >>> A scheme like this would drain the battery on top of the current >>> re-establishing draining, that already prevents me from using an >>> always-on profile - my iphone won't last for 4 hours. >>> >>> Perhaps we should look at other types of puzzles that do not depend on >>> raw CPU power? >> Great question. >> >> imho, if the hash calculations (and ike) are a big enough culprits, then >> perhaps the mobile SoC folks should consider bringing onboard IP that >> accelerates/offloads the hash calculations (and other aspects of ike) to >> more energy efficient component/sub-system? > > That’s just an arms race. If phones get specialized hardware that can do 2^25 > hashes in a second, the attackers can get such hardware too, and we’ll have > to turn up the difficulty to 25 bits. Older hardware (like older phones and > computers) will suffer. Great point, though a hinted point was that the hash speed remains similar while the power spent is reduced.
> > Yoav _______________________________________________ IPsec mailing list IPsec@ietf.org https://www.ietf.org/mailman/listinfo/ipsec
