Lpc2000

Hi,

I was working for a well-known financial terminal provider and we 
were contracting with a well-known chip supplier to develop a custom 
design.  I can't provide details on the design due to NDA.

What I can say is that the ARM "TrustZone" and "SecureCore" IP, when 
combined, provide a high percentage of what we were doing.  Offhand, 
I can't think of a current ARM9 implemenation that I'd consider for 
this.  We were using an ARM7 in our custom implemenation for cost 
(die area) reasons.

Regards,

Tom


-- In lpc2000@yahoogroups.com, "mirax_ua" <mirax_ua@y...> wrote:
> Hi Tom,
> This is quite good solution, btw, what processor did you use for 
> this RAM Decrypted Code Execution? And do you know any ARM9 
> processor with internal flash to keep decrypting code and key? I 
> guess this internal flash _must_ be read protected and LPC22xx 
suits 
> it but these processors have a bit limited RAM (you can find 
> processors with bigger internal RAM of course).
> 
> --- In lpc2000@yahoogroups.com, "tom_laffey" <tom_laffey@y...> 
wrote:
> > Hi,
> > 
> > My guess is that you are looking for a CPU for a secure 
> (financial?) 
> > application.  I worked on a platform a few years ago that stored 
> off-
> > chip programs and data in an encrypted form and then decrypted 
> pages 
> > into internal RAM as needed.  Quite a bit of "infrastructure" is 
> > required to do this sort of thing.  And you might want an ARM9 
> instead 
> > of an ARM7.  
> > 
> > To do this now, I'd be looking for an implemenation using 
> > ARM's "TrustZone" and "SecureCore" technology.  I haven't yet 
seen 
> this 
> > in generally available silicon.
> > 
> > Regards,
> > 
> > Tom
> > 
> > --- In lpc2000@yahoogroups.com, "mirax_ua" <mirax_ua@y...> wrote:
> > > Hello ppl,
> > > Those processors don't have any flash copy protection, do they? 
> As 
> > > long as there is some executable code in external memory and 
> that is 
> > > what external flash is meant for. You can hook up some of you 
> code 
> > > into external flash that will read the contents of internal 
> flash and 
> > > give it away via say serial interface. What protection are we 
> talking 
> > > about here?
> > > Acctually, I couldn't find any 32-bit processor that has both 
> > external 
> > > memory bus and internal flash with read protection.