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possibly encryptd EEPROM (t42)

 
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mecho
Nou Venit


Joined: 01 Nov 2005
Posts: 3

PostPosted: Wed Nov 02, 2005 12:05 am    Post subject: possibly encryptd EEPROM (t42) Reply with quote

Hi guys,

I have managed to dump the contents of the eeprom but it appears that the scancodes inside are enrypted, or at least they fail to revert to any logical character combination.

eeprom - 24RF08.



Here is the link:
http://tchorbadjiev.com/eeprom.zip


I have enabled the `passphrase vs. password` option and the security chip.

Can anyone help?
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victor
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Joined: 07 Mar 2004
Posts: 2581
Location: Staff

PostPosted: Wed Nov 02, 2005 4:01 am    Post subject: Reply with quote

It is TCPA encrypted. We have done it before for t42 w/o problems. The dump will suffer some modifications then you have to reprogram the eeprom.

Please contact me by email
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mecho
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Joined: 01 Nov 2005
Posts: 3

PostPosted: Wed Nov 02, 2005 1:56 pm    Post subject: Reply with quote

victor wrote:
It is TCPA encrypted. We have done it before for t42 w/o problems. The dump will suffer some modifications then you have to reprogram the eeprom.

Please contact me by email


First of all (for the forum record) - thank you for the clear instructions in this site, they really did a great job for me getting to the eeprom dump.

I will contact you via email
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Gonzo82nd
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Joined: 02 Nov 2005
Posts: 1

PostPosted: Wed Nov 02, 2005 11:15 pm    Post subject: T42 lost password Reply with quote

is this a common problem for t42? How hard is it to re-program the eeprom?
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bob
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Joined: 07 Mar 2004
Posts: 802
Location: Staff

PostPosted: Thu Nov 03, 2005 12:00 pm    Post subject: Reply with quote

TCPA is not a problem but a "plague" of today's world. Rolling Eyes
Writing the eeprom is easy if you use W24RF08.
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mecho
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Joined: 01 Nov 2005
Posts: 3

PostPosted: Sat Nov 05, 2005 2:30 pm    Post subject: T42 - done Reply with quote

Everybody,

today I have managed to write the EEPROM back (as per Victors instructions) and everything worked perfect !

----------------------------------------------------------------
Initializing timer...16319 OK!
Eeprom dump size: OK

Page mode. Writing eeprom...
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Done.
----------------------------------------------------------------

My TP had the ultra-fancy-junk-TCPA-chip enabled, passphrase etc. - and here is the result - a fully usable laptop again.
IBM security rulez ! Smile


Serious, thank you Victor - for the assistance and professionalism.

Cheers
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sebasarg
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Joined: 19 Mar 2006
Posts: 2

PostPosted: Sun Mar 19, 2006 1:12 am    Post subject: the same problem Reply with quote

hi everyone, its my firts post here, but i have to say THANX VICTOR TO BE A REALLY GOOD GUY, i really hope in the future, people will become a good person like you, really thanx.

well, i think i´ve the same problem, with the encrypted password in my tp t42, because in the ibm pass2.0 jus appears symbols, but the extrange is that in ibmpass 1.1 its say that my password is 4143, but it doesn{t work, so i really need help with this, please.

well, sorry about my english, but i dont speak or write it too much because i speak spanish everyday.

thanx again

ohh i forgoten, but when the tp start its say error 0176 system has been tampered with, this is because i have take out the battery, thinking that will solve the problem, but it doesnt. is this a big problem or is the same to recover the pass??
thanx again and again

sebas
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victor
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Joined: 07 Mar 2004
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PostPosted: Sun Mar 19, 2006 11:09 am    Post subject: Reply with quote

Hi,

If IBMpass cannot reveal the password (if not blank) then it is encrypted with TCPA chip for sure. Unfortunatelly, this service is not free.
Please contact us to support-at-allservice.ro and send also the dump to verify.

Indeed, 0176 error occured when you removed the CMOS batt. You'll get rid of that when you'll be able to enter BIOS setup, after reprogramming the eeprom.

Regards
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sebasarg
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Joined: 19 Mar 2006
Posts: 2

PostPosted: Sun Mar 19, 2006 11:16 am    Post subject: Reply with quote

ok, no problem about the money, its my pleasure to have the chance to contribute with you Laughing , because you help me a lot for free, teaching me how can i save my tp.

i ´ll send you the dump i get from my eeprom tp.

thank you very very much.

sebas
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Pyranha
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Joined: 26 Mar 2006
Posts: 1

PostPosted: Sun Mar 26, 2006 4:23 pm    Post subject: t42 Reply with quote

Hi, Seem to have the same problem. Can retrieve the bin file but makes no sense. If i'm right i need to buy the w24rf08 code. Can I pay using Paypal please.
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victor
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Joined: 07 Mar 2004
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PostPosted: Sun Mar 26, 2006 4:41 pm    Post subject: Reply with quote

You need the writer but the TCPA removal service is not free eighter.
Read carefully the W24RF08 download section.

Else, licensing and other related issues will be dicussed in private.
support-at-allservice.ro
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dolphin
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Joined: 28 Jul 2006
Posts: 1

PostPosted: Fri Jul 28, 2006 6:13 pm    Post subject: Reply with quote

sorry my english, iam mexican
my problen is:

ibmpass 1.1 and 2.0 lite not reveal my password

what is the direction of the passwor in the file .bin?
or what is the method of reveal the incryptation?
thank you

sorry iam speak spanish
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bob
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Joined: 07 Mar 2004
Posts: 802
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PostPosted: Fri Jul 28, 2006 6:39 pm    Post subject: Reply with quote

The TCPA reset service consist in modifying the eeprom.

The service including the eeprom writer license is $55. For details contact support-at-allservice.ro
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