Scrapheap Challenge and a month to build a vehicle to compete in a varied set of trials, such as auto "bowling", a race through a flooded course, a "car coaster", car "sumo" and other tests. The winners were the Aquaholics from the UK. Hosted by Cathy Rogers and Henry Rollins, it lasted one season. Another spin-off series was instituted from 2004 to 2006 and was broadcast following the main series. It was also presented by Robert Llewellyn and Lisa Rogers. It involved several teams being allocated a budget and several weeks to construct a road-legal vehicle which, if classified as a car,
Challenge–response authentication Challenge–response authentication In computer security, challenge–response authentication is a family of protocols in which one party presents a question ("challenge") and another party must provide a valid answer ("response") to be authenticated. The simplest example of a challenge–response protocol is password authentication, where the challenge is asking for the password and the valid response is the correct password. Clearly an adversary who can eavesdrop on a password authentication can then authenticate itself in the same way. One solution is to issue multiple passwords, each of them marked with an identifier. The verifier can ask for any of the passwords, and