Method, system and computer program product for comparing or measuring information content in at least one data stream
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United States of America Patent
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Aug 20, 2013
Grant Date -
Nov 19, 2009
app pub date -
May 19, 2009
filing date -
Oct 21, 2005
priority date (Note) -
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Abstract
Method, system and computer program product for comparing or measuring information content in at least one data stream including one or more data segments is provided. In at least one embodiment of the invention, information leak capacity in network traffic is quantified. Instead of trying to detect the presence of sensitive data—an impossible task in the general case—one goal of the method, system and computer program product is to measure and constrain its maximum volume. Most network traffic is repeated or determined by external information, such as protocol specifications or messages sent by a server. By filtering this data, one can isolate and quantify true information flowing from a computer. Measurement algorithms for the Hypertext Transfer Protocol (HTTP), the main protocol for web browsing are provided. When applied to real web browsing traffic, the algorithms were able to discount 98.5% of measured bytes and effectively isolate information leaks.
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