SenVa Posted July 31, 2005 Share Posted July 31, 2005 quote from krazynonsense Maybe a specially-programmed USB flash drive, could possibly serve as a workaround/substitute for the Apple TPM chip? would this work?....wouldnt os x or darwin need usb drivers? is this a waste of time? Link to comment Share on other sites More sharing options...
gwyllion Posted August 1, 2005 Share Posted August 1, 2005 You can not "clone" a valid TPM. You need a valid endorsement certificate for this and this can only be produced by the TCG and Infineon. Please read a bit some of the TCG specs. Link to comment Share on other sites More sharing options...
other Posted August 1, 2005 Share Posted August 1, 2005 You can not "clone" a valid TPM. You need a valid endorsement certificate for this and this can only be produced by the TCG and Infineon. Please read a bit some of the TCG specs. I'm a nerd an I like to tell people off. Geez you don't have to tell him in blank verse. Link to comment Share on other sites More sharing options...
gwyllion Posted August 1, 2005 Share Posted August 1, 2005 Sorry that I actually read the TCG specifications and have done some reverse engineering of an Atmel TPM. For some reason everybody seems to think trusted computing = DRM and TCG = evil. Personally, I don't think this is the case at all. Link to comment Share on other sites More sharing options...
Swad Posted August 1, 2005 Share Posted August 1, 2005 You can not "clone" a valid TPM. You need a valid endorsement certificate for this and this can only be produced by the TCG and Infineon. Please read a bit some of the TCG specs. Well, that's not entirely true. Check out this website: http://www.wavesys.com/products/ktmes.html It's quite possible to migrate the TPM keys, in case your computer were to fail, etc. So, while you can't really "clone" a TPM, you can migrate all its funtions to another TPM and copy it. Link to comment Share on other sites More sharing options...
gwyllion Posted August 1, 2005 Share Posted August 1, 2005 Not entirely true either. TCG makes a distinction between migratable and non-migratable keys. The most important key, the Endorsement Key, will never leave the TPM (by design non-migratable). Link to comment Share on other sites More sharing options...
Swad Posted August 1, 2005 Share Posted August 1, 2005 Ah, ok, thanks - I stand corrected. I had never read anything that told what keys you could and could not migrate. Do you have a website where we can read about the difference of keys? Link to comment Share on other sites More sharing options...
gwyllion Posted August 1, 2005 Share Posted August 1, 2005 Good documentation is difficult to find. There is a lot of {censored} on the internet regarding TC (especially the anti TCPA sites) and the TCG specifications are huge and thus extremely difficult to read. 2 good source of information are: - The people from HP wrote a book about TCPA: "Trusted Computing Platforms - TCPA technology in context" (ISBN 0-13-009220-7) - TCG Specification Architecture Overview: https://www.trustedcomputinggroup.org/downl...re_Overview.pdf Link to comment Share on other sites More sharing options...
Swad Posted August 1, 2005 Share Posted August 1, 2005 Thanks for the resources! Link to comment Share on other sites More sharing options...
maniac3389 Posted August 2, 2005 Share Posted August 2, 2005 sorry in advance if this is mentioned in documentation, but what bus is the TCM chip on? because if its on the PCI you could just use some TTL logic chips to decode addresses n make a add-on card so u have a plug-in TCM Link to comment Share on other sites More sharing options...
gwyllion Posted August 3, 2005 Share Posted August 3, 2005 All TPMs currently use the LPC (low pin count) bus (http://www.intel.com/design/chipsets/industry/lpc.htm). Link to comment Share on other sites More sharing options...
maniac3389 Posted August 3, 2005 Share Posted August 3, 2005 so basically if u dont have a computer with a LPC bus ur outta luck hardware-wise? Link to comment Share on other sites More sharing options...
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