On 3/2/13 1:10 PM, Peter Gottlieb wrote:
I had one for work a while back and asked the IT security guys about it
and was told that the change was on a fixed schedule but of course each
fob was a little different due to temperature, over time, etc and that
the system automatically "learned" the fobs and opened or tightened its
tolerance for when the fobs updated. So if you had a slow one the
system would adapt over time and just learn to expect that but if the
timing got too far off they would replace the fob. I suppose if you
kept messing with the timing by leaving in the sun or freezer eventually
you would get rejected logins and your IT people would want to replace
it, unless they manually really loosened up the timing windows. The
people I asked didn't mind my inquiries and seemed eager to chat but
some places might be a bit more paranoid.
The explanation in RSA's manuals is more like..
You set a tolerance window.. how many codes before/after are you willing
to accept. When it accepts your code, it resynchronizes it's master
timer (for your fob) to whatever you just entered. It doesn't go so
far as to try and adjust the "rate", just the "offset".
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