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[James Davis]

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Ian Batten wrote:

> This is part of the reason why SecureID tags are lifed, of course.  RSA
> guarantee operation until the expiration date, but after that they don't
> work, battery life or no.  So RSA can ship tags whose clocks will remain
> in bounds in terms of slew rate for five years >99% of the time, and fix
> the remaining <1% in the warranty process.   I don't know how Vasco
> manage this with their unlifed tags.

It's been several years now since I could put an RSA certification to my
name but I seem to remember that an administrator could manually
resynchronize an installation with a token, and that it worked over a
wider slew than the automatic process you described (20 minutes each way
I think).

I also seem to remember that it'd accept codes +- 1 minute without
further questioning. Otherwise you'd have problems with someone reading
the code 59 seconds in, and hitting enter 2 seconds into the next minute.

I'm not sure it's really why the tags have a limited life ;-) You should
be able to continually adjust and record any reasonable slew until the
battery dies. That may be similar to what the Vasco system does.

James

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