New Report Determines Blue Coat WebFilter is the Most Accurate URL Filtering Database

Blue Coat(R) Systems (Nasdaq: BCSI), the leader in secure content and application delivery, today announced that a new report from Broadband-Testing Laboratories, Europe's foremost independent network testing facility and consultancy organization, shows Blue Coat WebFilter to have the highest level of recognition and accuracy in classifying URLs among those tested. The test, conducted in Moux, France, compared Blue Coat WebFilter to Websense v6.1, SmartFilter v4, Surf Control and ALSI Intersafe.

The test shows that WebFilter accurately categorized a significantly higher number of URLs -- 2.4 times as many as Websense, 1.5 times as many as SmartFilter, 1.3 times as many as SurfControl and 3.8 times as many as Intersafe -- across all the "super categories" the laboratory determined for pornography, criminal/illegal, gambling, hate/violence, spyware and weapons.

Accuracy is an extremely important aspect of URL filtering. As the report notes in the executive summary, "It is all too easy to simply take it for granted that a URL filter gets it right -- categorizing every entry correctly ... but what happens if it doesn't? Or if it simply doesn't know what to do with a URL it finds?" Through a strict testing regiment, the laboratory determined that WebFilter provides the highest degree of accuracy overall.

Unlike other URL filtering products, Blue Coat WebFilter does not rely on site-mining processes such as Web crawlers to find new Websites and applications. Instead, to ensure accuracy and relevancy, Blue Coat leverages its large URL research customer base of off-box OEM deployments, its free K9 solution for families and individuals and its "on-proxy" WebFilter deployments to increase the size of its database. On average, these customers feed more than 50 million URLs each day into the Blue Coat research engine, which has an overall database of 13.5 million URLs. In addition, Blue Coat Labs actively monitors and classifies spyware sites and assesses existing URLs with specialized algorithms to ensure ratings stay current and accurate. To further strengthen the size and accuracy of its URL database, Blue Coat uses Dynamic Real-Time Rating (DRTR(TM)), a unique, proprietary tool that categorizes new or unrated URLs "on the fly" as users attempt to access them.

The report concludes, "Our results also showed that -- in the real world -- Blue Coat WebFilter is simply more flexible and intelligent than the other databases in the test, in terms of how it is able to collect and categorize URLs that the others either cannot find in the first place, or do not have the means of categorizing at all."

The report is available as a free download from http://www.broadband-testing.co.uk.

About Blue Coat Systems

Blue Coat helps organizations make the Web safe and productive for business. Blue Coat proxy appliances provide visibility and control of Web communications to protect against risks from spyware, Web viruses, inappropriate Web surfing, instant messaging (IM), video streaming and peer-to-peer (P2P) file sharing -- while actually improving Web performance. Trusted by many of the world's largest organizations, Blue Coat has shipped more than 25,000 proxy appliances. Blue Coat is headquartered in Sunnyvale, California, and can be reached at (408) 220-2200 or http://www.bluecoat.com.

FORWARD LOOKING STATEMENTS: This press release contains forward-looking statements that involve risks and uncertainties. The statements contained in this Report that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding the benefits to be gained by Blue Coat Systems through the acquisition of Permeo, the value of Permeo's products to Blue Coat Systems and its customers, and the financial impact on Blue Coat Systems of the acquisition, as well as statements on our expectations, beliefs, intentions or strategies regarding the future and including the statements regarding the capabilities and expected performance of Blue Coat Systems' products. All forward-looking statements included in this document are based on information available to us on the date hereof. We assume no obligation to update any such forward-looking statements. Our actual results could differ materially from those indicated in such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, the risks discussed under the heading "Risk Factors" in our most recently filed Form 10- Q for the quarter ended October 31, 2005, and other reports filed from time to time with the Securities and Exchange Commission.

NOTE: All trademarks, trade names or service marks used or mentioned herein belong to their respective owners.

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