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Message

Re: [AVR-Chat] Re: LOCK BIT

2003-12-01 by Emerson Santos

hahahaha !!! I never think that is so easy :)
----- Original Message -----
From: moriarty70
Sent: Monday, December 01, 2003 9:18 AM
Subject: [AVR-Chat] Re: LOCK BIT

You can use an electron microscope to read the memory according to
this PDF:

http://www.cl.cam.ac.uk/~mgk25/sc99-tamper-slides.pdf

If you know the precise location of the lock bit you might be able to
change its state by bombarding it with electrons.

If it were a simple job to read the memory of a "locked" AVR the lock
bit would be useless, right?

Have Fun!

--- In AVR-Chat@yahoogroups.com, "Emerson Santos"
wrote:
> Hi people !!!
>
> Anyone know a kind of "backdoor" in AVR to read a chip
> with a enabled LockBit ???
>
> Could I read a PRG in Flash .. in this conditions ??? (lock bit =
ON)
>
> Tanx'S ALL



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