[Cryptography] on brute forcing 3DES to attack SIMs
James Cloos
cloos at jhcloos.com
Fri Jan 2 11:44:25 EST 2015
>>>>> "JL" == Jerry Leichter <leichter at lrw.com> writes:
JL> Let's go back to the other claim. They are claim about 3*10^8
JL> encryptions/sec, or 3*24*60*60*3*10^8 ~= 4*10^6*3*10^5 ~= 10^12
JL> encryptions in 3 days. Using the standard approximation that 2^10 ~=
JL> 10^3, we get about 2^40 encryptions in three days.
Actually multiplying 3*24*60*60*3*10^8 gives 77760000000000.
log(3*24*60*60*3*10^8)/log(2) == 46.14409345
Fixing the . vs , as you later did, one gets much closer to 56:
log(245760*10^6*3600*24*3)/log(2) == 55.82216536
(Checked with pari/gp, as it was convienient.)
-JimC
--
James Cloos <cloos at jhcloos.com> OpenPGP: 0x997A9F17ED7DAEA6
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