[Cryptography] on brute forcing 3DES to attack SIMs

[James Cloos]

>>>>> "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