1. A team of "white-hats" attack and secure systems. Some of these teams are given the task to penetrate the systems, other are just to review security procedures with an eye of how they might be penetrated. This is a favorite of government and paranoid organizations. Controversy: Tiger teams aren't afraid of prosecution and start with a greater degree of knowledge about the victim. Therefore, many people argue whether a successful penetration by a tiger team reflects a real-world scenario. For example, if you don't fear prosecution, then you might simply do a physical break-in. A physical break-in will always result in a successful "hack" because you can install keystroke loggers, password sniffers, or simply steal disk drives. Controversy: There are some cases where tiger teams have actually stolen sensitive information. History: This originally a military term, where teams would enter secure installations and leave behind notes like "bomb" or "theft" in sensitive areas to prove that they had been there, and that they could have left behind bombs or stolen secret plans. From Hacking-Lexicon