Huffman coding

Huffman coding was a way of compressing data when stored on a computer.

When Brad Hammond arrived at CTU to locate Ryan Chappelle, Tony Almeida told Michelle Dessler it would be better for her to work offsite. She asked how she would get through the CTU firewall, and he gave her a data card that had been Huffman coded, containing software allowing her to access CTU's network remotely.