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PICList Thread
'Code is NOT Secure with PIC'
1997\12\18@103302 by dejan

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face
Hi to all.

In July 1996 when I worked on my project for programming PICs, I
discovered something interesting. There is a bug on PIC 16c71  that
allows you to read contents from protected programmed PIC !!! This
techniqe is destructive, so I have never used it on non windoved PICs
(otp). But there is a problem,  product on the end is data with 1-bit
error (13 bits are ok and only 1 is unknown) so I have 2 codes per 1
instruction.
This bit is usually used for high file access (movwf 89h ) so in that
case it is easy to determine correct instruction.This technique maybe
works on others serial programmed
PICs.

Is anyone inerested for this (Program can work on AN589)

Ciao,                Dejan

Love takes a lot of time, but who cares ?!  Make PICs not war(ez) !

spam_OUTdejanTakeThisOuTspamnet.yu
http://www.net.yu/~dejan






Martin R. Green wrote:

{Quote hidden}

1997\12\18@103302 by dejan

flavicon
face
Hi to all.

In July 1996 when I worked on my project for programming PICs, I
discovered something interesting. There is a bug on PIC 16c71  that
allows you to read contents from protected programmed PIC !!! This
techniqe is destructive, so I have never used it on non windoved PICs
(otp). But there is a problem,  product on the end is data with 1-bit
error (13 bits are ok and only 1 is unknown) so I have 2 codes per 1
instruction.
This bit is usually used for high file access (movwf 89h ) so in that
case it is easy to determine correct instruction.This technique maybe
works on others serial programmed
PICs.

Is anyone inerested for this (Program can work on AN589)

Ciao,                Dejan

Love takes a lot of time, but who cares ?!  Make PICs not war(ez) !

.....dejanKILLspamspam.....net.yu
http://www.net.yu/~dejan






Martin R. Green wrote:

{Quote hidden}

1997\12\23@204103 by dejan

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face
Hi to all.

For all that interested about reading protected programed PIC 16c71
(16c61)
on my home page:

            http://www.net.yu/~dejan
            http://www.geocities.com/SiliconValley/Horizon/6063/

You can find  CrackPic.zip

Crack PIC 16c71 is a program that allows reading the contest of a
programmed and protected PIC 16c71!
It works with a AN589 programmer connected at LPT1, and you must start
it under 32-bit DPMI (Under
Win95, etc.).
You`ll find more info in readme.txt file when you download CrackPic.zip!

My program should work with PIC 16c61 as well (I haven`t tried it yet).
If you test it on PIC 16c61, or on any other PIC will you please let
me know what have you done, so that we can force MICROCHIP to protect
its users by REALLY protecting PIC`s!!!


You may send your comments at:

 eMail: @spam@dejanKILLspamspamnet.yu

Dejan

1997\12\23@232651 by dejan

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face
Dejan Kaljevic wrote:

> Hi to all.
>
> For all that interested about reading protected programed PIC 16c71
> (16c61)
> on my home page:
>
>              http://www.net.yu/~dejan
>              http://www.geocities.com/SiliconValley/Horizon/6063/

Please don't use WEB
http://www.geocities.com/SiliconValley/Horizon/6063/

Use only:    http://www.net.yu/~dejan
                 http://members.tripod.com/~dejank


Thanks,        Dejan


'CODE IS NOT SECURE WITH PIC'
1998\01\08@205916 by dejan
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face
Hi to all.

Since lots of people has emailed me questions about CrackPic, and I
haven`t been able to answer all of them,  I`ve decided to put detailed
instructions and source file on my site at:

http://www.net.yu/~dejan

Instructions and sources are in the theory.txt in crackpic.zip file!

Ciao,    Dejan

Srecna Nova godina!
--

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