Pastebin, the Ti-89 signing keys, and the DMCA

I’ve had a DMCA takedown request sent in relation to a pastebin post containing the signing keys for a range of Texas Instruments calculators which, if I understand correctly, allow you to digitally sign a replacement operating system so that the hardware will accept it.

If you buy a piece of hardware, I firmly believe you should be able to do whatever you like with it, and people installing their own operating systems and *improving the damn product* is something TI should be happy about.

There’s a blog over at which is enthusiastic about this sort thing, and you can read wide and varied discussion about the issue on SlashDot too. (Edit: on 23rd Sep The Register weighed in with this article)

So, here is the DMCA takedown request Texas Instruments sent to me:

September 17, 2009
To Whom It May Concern:
Re: Illegal Offering of Material to Circumvent TI Copyright Protections
VIA: report abuse at

It has come to our attention that the web site, contains material and/or links to material that violate the anti-circumvention provisions of the Digital Millennium Copyright Act (“DMCA”). This letter is to notify you, in accordance with the provisions of the DMCA, of these unlawful activities. Pursuant to the safe harbor provisions of the DMCA, we request that you remove any whole or partial reproductions of and/or disable links to the following:

The post located on

Texas Instruments Incorporated (“TI”) owns the copyright in the TI-83 Plus, TI84 Plus and TI-89 operating system software. The TI-83 Plus, TI-84 Plus and TI-89 operating systems use encryption to effectively control access to the operating system code and to protect its rights as a copyright owner in that code. Any unauthorized use of these files is strictly prohibited. is distributing or providing links to information that bypasses TI’s anti-circumvention technology. By providing copies of or offering links to such information, has violated the anti-circumvention provisions of the DMCA at 17 U.S.C. §§ 1201(a)(2) and 1201(b)(1).

Please confirm to the undersigned in writing no later than noon on September 18, 2009 that you have complied with these demands. You may reach the undersigned by telephone at (xxx) xxx-xxxx or by email at TI reserves all further rights and remedies with respect to this matter.
I hereby confirm that I have a good faith belief that use of the Illegal Material in the manner complained of in this letter is not authorized by the copyright owner, its agent, or the law, that the information in this letter is accurate, and that, under penalty of perjury, I am authorized to act on behalf of TI, the owner of the exclusive rights in the TI-83 Plus, TI-84 Plus and TI-89 operating system software that are allegedly misappropriated using unlawful methods.
Texas Instruments Incorporated

Manager, Business Services
Education Technology Group

I live in the UK, and is hosted in the UK, so hitting me with a DMCA takedown request is rather pointless. However, I do remove copyrighted content on request, so much as it pains me to do so, I’ve deleted that post for now.

It’s no biggie, if you want the keys, just check wikileaks or do a Google search for 82EF4009ED7CAC2A5EE12B5F8E8AD9A0. That’s just a long hexadecimal number. Pretty sure I’m free to express that number in any form I like.

Can you say “Streisand Effect”?

Edit: Interesting post here on dealing with these TI DMCA notices. Persoanlly, I’m not interested in fighting to keep the post on as it is widely available elsewhere. I have a copy of the keys should I ever wish to actively distribute them though…

Edit#2, Oct 14th 2009: The Electronic Frontier Foundation have written the following about this issue: EFF Warns Texas Instruments to Stop Harassing Calculator Hobbyists.

2 thoughts on “Pastebin, the Ti-89 signing keys, and the DMCA

  1. Pingback: Texas Instruments DMCA abuse at PreshBlog

  2. Seth might have wittely said

    > I live in the UK, and is hosted in the UK,
    > so hitting me with a DMCA takedown request is ..pointless

    It would seem [1] that few American law firm employees scored well in their respective geography courses. If I were to become a managing partner of a law firm I would definitely require applicants- and interns of my Intellectual Property Group to produce transcripts back to middle school (7th-8th year of education in USA) for all geography inclusive courses.

    While I, too, would remove copyright violation of the clear intent to pirate, per se, I would engage a solicitor (correct UK term?) to defend pastebin against having to monitor- or be responsible for content filtration given the SELF EVIDENT nature of the beast.

    I do enjoy receiving hate-mail, cease and desist orders, and the like. I have not yet received a fascist DMCA demand.

    I strongly believe in the “freedom to tinker” that the DMCA would like to bludgeon to death with a bit of chalk.

    It’s woeful how IP firms, especially patent prosecutors themselves, remain willfully ignorant about the history of patent development, per se.

    On a similar note I could care less if company X, in this case TI, would not want ME to use the calculator I PURCHASED in a way other than TI intended..

    TI’s behavior is extremely antithetical to the American way.

    ..and further if they would balk at me sharing my creative usage with others. If I want to hack my calculator into an expensive etch-a-sketch then there’s little legal recourse available to TI. If they want to outfit their devices with a transponder to alert their thought police division that a tamper might be in progress have at; I can use a Faraday passport enclosure with all future calculators. The same applies to making the device of a particular flavor function better than it had originally.

    Consumer devices with open firmware tend to sell in greater volume. Gee, why ever could that be? (dd-wrt)

    @ TI consider the events surrounding your founding and contrast that attitude with the one you have displayed here most recently. Any twinge of remorse?


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