Code security on modern 32bit embedded processors

Wondered what the state of the art is on keeping embedded code secret. 
Who does it better these days?

I see some secure processors from Atmel and a few others, but they seem 
more oriented to securing comms and data than in securing their own code.

tns1 wrote:

> Wondered what the state of the art is on keeping embedded code secret. 
> Who does it better these days?
> I see some secure processors from Atmel and a few others, but they seem 
> more oriented to securing comms and data than in securing their own code.

http://www.flylogic.net/blog/?cat=3

VLV

Vladimir Vassilevsky wrote:
> http://www.flylogic.net/blog/?cat=3
> 
> VLV
> 

If these guys do this just for fun, I suppose there must be low-profile 
companies who will pull the code off of any chip for $$$, no questions 
asked.

So the best security is to design things no one wants to duplicate.

> Wondered what the state of the art is on keeping embedded code secret.
> Who does it better these days?
> 
> I see some secure processors from Atmel and a few others, but they seem
> more oriented to securing comms and data than in securing their own
> code.

ARM TrustZone provides a convenient way for authenticating code, but
for confidentiality you need also some secure storage. There should be
some ARM chips like that out there.

Legrandin