ArcSight Announces ArcSight Protect ’08 Conference and Keynote Speakers
Fourth Annual Event to Focus on Customer Panels and Case Studies that Highlight How to Protect Your Business and Achieve Optimal Results by Leveraging ArcSight Solutions

Cupertino, Calif. – April 28, 2008–ArcSight, Inc. (Nasdaq: ARST), a leading global provider of compliance and security management solutions that protect enterprises and government agencies, today announced the keynote speakers for its fourth annual conference taking place in the Washington, D.C., metropolitan area from September 7-10, 2008. The company also announced the focus of the conference; ArcSight Protect ‘08 is all about protecting enterprises and government organizations. The conference will address industry trends and best practices in security, user monitoring, log management, compliance and networking.

The conference keynote speakers include the following:

• Cynthia Cooper, CPA, CISA, CFE - Cooper is most well-known for her role in uncovering the corporate fraud at WorldCom, the largest corporate fraud in history to date. She was named one of Time Magazine’s 2002 Persons of the Year after detecting and reporting the fraud. Cooper is also the author of “Extraordinary Circumstances: The Journey of a Corporate Whistleblower” (February 2008, John Wiley & Sons).
• Robert W. Cressey, president and founder of Good Harbor - Cressey advises clients on homeland security, cyber security and counterterrorism issues. He is currently an on-air counterterrorism analyst for NBC News. He has previously served as chief of staff to the President's Critical Infrastructure Protection Board at the White House as well as director for transnational threats on the National Security Council.

Additional speakers will include ArcSight Chairman and CEO Robert Shaw; Hugh Njemanze, ArcSight CTO and executive vice president of research and development; and many ArcSight customers.

“ArcSight Protect ‘08 provides an interactive forum for sharing best practices and remains a cornerstone in the company’s commitment to driving customer success,” said Reed Henry, senior vice president of marketing and business development. “Industry experts and advanced users of ArcSight products will share with ArcSight Protect ’08 attendees their know-how and innovative strategies for protecting their businesses. Topics will include how to connect the dots across traditional security events to real-time information about who is on the network, what information they are seeing and which actions they are taking with that information. Attendees will also learn how their peers have built effective ongoing security, risk and compliance management programs.”

ArcSight Protect ’08 will feature more than 70 breakout sessions focusing on a variety of topics, including compliance, networking, user monitoring and log management. In addition, tutorials will be offered after the conference.

To see the full agenda and to register, please visit www.arcsight.com/userconference or email userconference@arcsight.com.

About ArcSight
ArcSight (NASDAQ: ARST) is a leading global provider of compliance and security management solutions that protect enterprises and government agencies. ArcSight helps customers comply with corporate and regulatory policy, safeguard their assets and processes and control risk. The ArcSight platform collects and correlates user activity and event data across the enterprise so that businesses can rapidly identify, prioritize and respond to compliance violations, policy breaches, cybersecurity attacks and insider threats. For more information, visit www.arcsight.com.

ArcSight and the ArcSight logo are trademarks of ArcSight, Inc.

Contact Information:
Kristin Kiltz – Engage PR, PR for ArcSight
Tel: 510-748-8200 ext. 204
Email: Kristin@engagepr.com