How can pass shop security systems?

Speedpass is a keychain RFID device introduced by Mobil for electronic payment. As of 2004, more than seven million individuals possess Speedpass tags, which can be used at approximately 10,000 Exxon and Mobil gas stations worldwide. At one point, Speedpass was deployed experimentally in fast-food restaurants and supermarkets in select markets. McDonald's alone deployed Speedpass in over 400 Chicagoland restaurants. Additionally, Stop & Shop grocery chain tested Speedpass at their Boston area stores and removed the units in early 2005. The test was deemed a failure and McDonald's removed the scanners from all their restaurants in mid 2004. Speedpass has also been previously available through a Speedpass Car Tag and Speedpass-enabled Timex watch.