tailieunhanh - The next great telecom revolution phần 8

Nội dung tần số thấp của các thiết bị UWB có thể thâm nhập vào các cấu trúc vững chắc, "Buehrer, một trợ lý giáo sư kỹ thuật điện và máy tính và điều tra chính của dự án. Điều đó sẽ làm cho UWB rất hữu ích cho việc truyền tín hiệu thông qua các tòa nhà và các chướng ngại vật nhân tạo và tự nhiên khác. | 156 THE UNBLINKING EYE SECURITY AND SURVEILLANCE based services on mobile devices as well as in preferences-driven call forwarding and blocking using both circuit-based and session initiation protocol SIP phones. SECURING PRIVACY As more smart phone PDA and PC users connect to servers in order to participate in shopping banking investing and other Internet activities a growing amount of personal information is being sent into cyberspace. Furthermore every day businesses and government agencies accumulate increasing amounts of sensitive data. Despite advances in cryptology security database systems and database mining no comprehensive infrastructure exists for handling sensitive data over their lifetimes. Even more troubling no widespread social agreement exists about the rights and responsibilities of data subjects data owners and data users in a networked world. Now collaborators in a new NSF project aim to bring order to the chaotic world of personal data rights and responsibilities. The privacy project s goal is to invent and build tools that will help organizations mine data while preserving privacy. There is a tension between individuals privacy rights and the need for say law enforcement to process sensitive information says principal investigator Dan Boneh an associate professor of computer science and electrical engineering at Stanford University. For example a law enforcement agent might want to search several airline databases to find individuals who satisfy certain criteria. How do we search these databases while preserving privacy of people who do not match the criteria asks Boneh who notes that similar questions apply to health and financial databases. Government and business both want more access to data notes Joan Feigenbaum a Yale computer science professor and one of the project s investigators. She notes that individuals want the advantages that can result from data collection and analysis but not the disadvantages. Use of transaction data and