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Re: Is protected flash secure?

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On 02/16/2017 11:41 PM, Klaus Kragelund wrote:
> Hi
> 
> So, I have been using a ST Cortex M0 STM32, NXP LPC, PIC32 and also a Renesas RX63. Just for fun. They look interesting as a potential candidate 
> 
> All processors has a bit to set it up in protected mode, so the flash with proprietary IP cannot be read out 
> 
> But, say my competitor wants to dig into my code
> 
> Is there really such a thing as a safe micro controller which memory is protected from Reverse Engineering conducted by a Russian or Chinese firm?
> 
> Isn't it just a matter of how much you pay for an invasive attack? (I have read numbers from 1000 to 20.000 USD)
> 
> Regards 
> 
> Klaus
> 
Andrew Zonenberg has a nice blog on decapping. I guess with access to a SEM it should 
be quite possible to sense the gate charge. 

<http://siliconexposed.blogspot.com/>

I think there was also a presentation of his at a DefCon some years ago. I don't have a link. 

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Thread

Is protected flash secure? Klaus Kragelund <klauskvik@hotmail.com> - 2017-02-16 14:41 -0800
  Re: Is protected flash secure? Johann Klammer <klammerj@NOSPAM.a1.net> - 2017-02-17 00:22 +0100
  Re: Is protected flash secure? Don Y <blockedofcourse@foo.invalid> - 2017-02-16 20:38 -0700
  Re: Is protected flash secure? Paul Rubin <no.email@nospam.invalid> - 2017-02-16 20:54 -0800
  Re: Is protected flash secure? Theo Markettos <theom+news@chiark.greenend.org.uk> - 2017-02-17 12:38 +0000

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