New Quantum Strategy Keeps Web Searches Private


	New Quantum Strategy Keeps Web Searches Private

wildcat

6-28-2008 5:59 AM

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tags:

science, quantum private queries, privacy

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When an Internet user types a word or phrase into a search engine, the Web server has the ability to find out that inquiry. As more people and businesses are becoming concerned about privacy, researchers are developing new ways to make online activity more secure for both users and servers. <BR /></DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.physorg.com/news133765318.html"><DIV> 
Recently, physicists have created a cheat-sensitive protocol called quantum private queries (QPQ). The quantum-based system allows a user to search for and retrieve an item from a database without revealing that item to the server. If the server tries to find out the item, the user can tell, and modify their use accordingly. 
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							The server is also protected because the user can only retrieve a limited amount of information in a single query, so the server doesn’t have to reveal its entire database. Compared with other strategies, the QPQ can provide a much simpler private information retrieval tool in terms of both communication and computation.
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