PRESS RELEASE

PALO ALTO, Calif., December 1, 2009 " Leading web anti-malware provider Dasient today announced that the monitoring and diagnostic components of its Web Anti-Malware (WAM) service have graduated out of beta. The Dasient WAM services have successfully helped tens of thousands of site owners address their web-based malware issues to date, and are now generally available at http://www.dasient.com.

"Prior to using Dasient, we had repeated issues with malware infections on our website," said Heiko Mitzkus, president of Enlighten Living, a retailer specializing in home lighting and ceiling fans. "And by the time we realized we were infected, search engines and browsers had already blacklisted us, causing an 80% drop in traffic and sales. Dasient WAM is a great preventative tool to have, giving us advance warning that our site is hosting malicious content before we're flagged by a blacklist."

With the graduation of these services into general availability, a number of new features have been introduced. These include richer reporting tools that will provide customers with data on the number of URLs scanned each week, lists of all URLs scanned and attacks being checked for, and the latest web-based malware attacks Dasient has detected. They also include new account management features that will enable customers using Dasient WAM to protect multiple domains to manage all those domains using a single login.

Other new updates include significant upgrades to the overall speed and reliability of the Dasient WAM scanning technology, as well as the ability to scan customer sites for links to dangerous downloads that might be placed in user-generated content or in syndicated ads on those sites.

"In the last six months, we've continued to build out the scalability, reliability, and speed of our Dasient WAM malware detection platform and have proved its readiness with tens of thousands of beta customers," said Dr. Neil Daswani, one of Dasient's three co-founders. "We're excited to now be able to bring Dasient WAM to even more businesses on the web, to help them protect their sites from the serious threat of web-based malware."

Services like Dasient WAM are becoming increasingly important to companies of all types and sizes, as attackers are focusing more than ever on compromising legitimate websites and using them to distribute malware. In the second half of this year alone, Dasient has identified more than 98,000 unique web-based malware infections, which in turn have impacted hundreds of thousands of sites and millions of pages. The speed, scale, and complexity of these attacks makes it extremely difficult for site owners to identify and fix the resulting infections, and as a result, more and more legitimate sites are feeling the effects of web-based malware infection, which can include loss of traffic, decline in revenue, and damage to brand equity.

About Dasient

Dasient is an Internet security company that protects businesses from web-based malware attacks. It is the first to develop a complete web anti-malware service that can monitor, automatically identify, and quarantine malware on websites before it can infect visitors and cause a loss of traffic, reputation, and revenue. Dasient was founded by former Google engineers Neil Daswani and Shariq Rizvi and former McKinsey strategy consultant Ameet Ranadive. They are backed by a group of seed investors who also invested in VeriSign, Citrix, Twitter, Digg, Tumbleweed, Finjan, and more. More information about Dasient can be found at www.dasient.com and www.twitter.com/dasient.

About Dasient WAM

The Dasient WAM services are built on a set of behavioral analysis technologies that continually crawl customer sites and the web, identifying new web-based malware infections. The monitoring and diagnostic components are provided to customers as a web service, and the quarantining technologies are made available as web server modules that can be installed by customers or web hosting providers.