Signing Keys
In 2009, a group of enthusiasts used brute force and distributed methods to find all of the cryptographic signing keys for the calculator firmwares, allowing users to directly flash their own operating systems to the devices. The key for the TI-83+ calculator was first published by someone at the unitedti.org forum. They needed several months to crack it. The other keys were found after a few weeks by the unitedti.org community through a distributed computing project. Texas Instruments then began sending out DMCA take-down requests to a variety of different websites mirroring the keys, including unitedTI and reddit.com. They then became subject to the Streisand effect and were mirrored on a number of different sites, including Wikileaks.
Read more about this topic: TI-83 Series
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