TI-83 Plus OS signing key cracked

Pt 2112
Looks like it might be possible to run other OSes without additional software on the TI-83...

The ever-mysterious Benjamin Moody posted a cryptic message on the United-TI forum yesterday. In it, he listed the factorization of the 512-bit RSA modulus used by TI's OS signing key for the 83+ (the "0004 key"). No other details are yet available about how he achieved this feat of substantial brute forcing power. In the event of United-TI downtime, Brandon Wilson has put a copy of Benjamin's values on his personal website.

With this achievement, any operating system can be cryptographically signed in a manner identical to that of the original TI-OS. Third party operating systems can thus be loaded on any 83+ calculators without the use of any extra software (that was mentioned in recent news) Complete programming freedom has finally been achieved on the TI-83 Plus!

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Comments

Oldest comments listed first.

Posted by: Hans on August 18, 2009 at 12:42 AM

Maybe try learning to read? Despite your claim it is very well documented how this was done, just a few postings down the thread.


Posted by: Phillip Torrone on August 18, 2009 at 10:05 AM

re-read the post

@hans - re-read the post, i quoted ticalc.org... it's not "our" claim.


Posted by: Nony Mouse on August 28, 2009 at 7:46 AM

math disappearing from the Internet?

This news seems to have sparked an interesting phenomenon - the reddit/etc., articles about this post, and several mentions in blogs, seem to be rapidly disappearing from the Internet.

Perhaps the numbers
5,174,413,344,875,007,990,519,123,187,618,500,139,954,995,264,909,695,897,020,209,972,309,881,454,541

and

1,325,290,319,363,741,258,636,842,042,448,323,483,211,759,628,292,406,959,481,461,131,759,210,884,908,747.

have some qabalistic power to unleash an Internet vacuum cleaner...


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