Replies to post #5220 on Wave Systems Corp. (fka WAVXQ)

[awk]

ZSeev Hed: I am digging right now.. /e

[awk]

Zeev Hed: RTC

Go to this Datasheet; It will give you the info you're looking for...

http://www.wave.com/about/datasheets/03-000136_TAN.pdf

Applications and services that must verify the precise date and time
of events need an uncontestable time source. The TAN’s Device
Server offers trusted time services and ensures that EMBASSY
devices have accurate local time according to their time
synchronization schedule.

Hope this helps...

awk

[aleajactaest]

Zeev Hed, the whole Wave structure is based on the premise that valuable bits (of various kinds) can be moved sufficiently securely to make it worthwhile.

BUT

1. No one claims failure is inconceivable. Just that it will fail well if it does so (meaning the problem will be isolated to the errant machine not the system).

2. Where the probability of failure and its cost are sufficiently low, insurance is capable of addressing the risk of loss.

3. I am not clear that the TPMs contain a clock. EMBASSY did, but currently the open channel resides with the TPM substructure.

4. There is little more than circumstantial data to support Wave's view of the near watertightness of its system. EDS tested it a year or two back. There have been one or two trials in Europe and Puerto Rico. But these were with the EMBASSY chip. Now IBM, Intel, NSM and Infineon are prepared to associate themselves with Wave's claims (some more loosely than others) in the TPM space. But there's little science to work with.

[awk]

Zeev Hed: RTC and the TAN...

I happen to be of the opinion that you are familiar with the requirements of manufacturing high precision mechanical components i.e/. HD drive shafts...let me try to connect that to the TAN.

Let's say one must manufacture/cylindrically grind components to diametrical tolerances of less than 1 micron.

Such a high precision grinding machine is equipped, obviously, with in-process-gauging. But given the hostile environment such a machine/in-process-gauging is in (thermal variations, wear, system drifts) it becomes necessary that a post-process-gauging system is superimposed onto the system in order to verify/recalibrate the in-process-gauging system from time to time.

I apply this this to the TAN:

While the E2100 chip has secure local time it becomes necessary to recalibrate the secure local time from time to time. And this is also done via the TAN

Like we've been saying: It's the TAN, the TAN...too bad I still do not have the understanding about it that I wish I had...

awk