Clean Slate

The Clean Slate was a computer program used to delete identities from databases around the world in The Dark Knight Rises.

Origin
Rykin Data created a prototype computer program to erase people's identities from databases. This came to the attention of John Daggett, who purchased the company only to be led to believe that the program was a myth. It had also come to the attention of Bruce Wayne, who had secretly acquired the Clean Slate tool to keep it out of the hands of someone dangerous.

The Dark Knight Rises
Selina Kyle agreed to copy Bruce Wayne's fingerprints in exchange for the Clean Slate tool from Daggett, but Daggett did not keep his end of the bargain. Bruce later tells Selina that Batman had the tool and wanted to meet with her. Fearing for her life, she betrayed Batman to Bane instead of attempting to win his confidence that she was not someone dangerous. After Bruce escaped from the Pit and returned to Gotham City, he offered her the tool.