Traditional computers shuffle information in the form of binary numbers, the digits 1 and 0, which are remembered by the "on" and "off" positions of tiny switches, or "bits", on the circuit boards. Quantum computers use atoms and subatomic particles as the switches that perform the memory and processing tasks. As the threat posed by internet viruses and hackers to people's personal computers increases, quantum cryptography could become a standard feature of desktop computers to ensure safe internet communication. (SFI External) Professor Seth Lloyd, a quantum mechanical engineer at the Massachusetts Institute of Technology, believes this property of quantum computing has opened up another new possibility, that is of growing concern to internet users. His research has revealed a way of using quantum computing to keep personal information private. Currently, internet sites and search engines can keep large amounts of information about people's computer and search practices. "If you use what I am calling quantum private queries, it would allow you to ask a question of a search engine like Google, but keep your own information private. If they try to keep your information, you will know about it. It will allow computer users to know no one else is snooping on their information," said Professor Lloyd.