TPMs have come as standard with nearly all computers (except Macs, doh) for a long time. They certainly don't cost $100. More like a few dollars at most. That's why they're so slow. On Tue, Jul 30, 2013 at 10:43 PM, grarpamp wrote: > On Tue, Jul 30, 2013 at 8:12 AM, Mike Hearn wrote: > > The TPM is a piece of secure* hardware > > I've seen some motherboards with a TPM module header but none > came with it installed. I think the modules themselves might be > $50-$100 range. They might come with some API docs. > Some of you might have links to ones you've used... > > > As part of that role, the TPM provides some permanent storage in the form > > of NVRAM. Because the TPM is designed to be as cheap as possible, it has > a > > limited number of write cycles. Normally you're meant to store Intel TXT > > launch control policies and sealed keys there > > > the goal is to avoid wearing down the drive and extend its useful life. > > Normally it doesn't matter, but if you want to delete data such that it's > > really really gone, it obviously poses a problem. Using TPM NVRAM solves > > it, albiet, at a high usability cost. > > If said TPM storage has a 'limited [but unfixed number of write cycles', > that > sounds unreliable. It would seem to me that both reliable and 'really gone' > are achievable on platters (or lesser, with ssd) provided the disk was also > encrypted. Nuke that key and it's reliably gone. > > > ------------------------------------------------------------------------------ > Get your SQL database under version control now! > Version control is standard for application code, but databases havent > caught up. So what steps can you take to put your SQL databases under > version control? Why should you start doing it? Read more to find out. > http://pubads.g.doubleclick.net/gampad/clk?id=49501711&iu=/4140/ostg.clktrk > _______________________________________________ > bitcoin-list mailing list > bitcoin-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-list >