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ScottishPower Awards VeriSign Multi-Year Managed Security Services Contract, Significantly Expanding Existing Relationship

VeriSign To Provide 24/7 Management and Monitoring of Security Infrastructure, Maintaining Data Integrity for ScottishPower’s Consumer, Trading and SCADA Networks

MOUNTAIN VIEW, CA. and LONDON, ENGLAND – INFOSEC 2005 – April 25, 2005 – VeriSign, Inc. (Nasdaq: VRSN), the leading provider of intelligent infrastructure services for the Internet and telecommunications networks, today announced it has been awarded a multi-year contract to manage network security devices for ScottishPower, an international energy business listed on both the London and New York Stock Exchanges, with an annual turnover in the year to 31 March 2004 of $10,666 million. VeriSign will monitor ScottishPower’s security environment through the use of VeriSign® Managed Security Services (MSS). The contract award represents an expansion of the existing relationship between VeriSign and ScottishPower.

“ScottishPower has been a key VeriSign customer, and the award of this additional business recognizes the unique value our Intelligence and Control™ services can provide to enterprises to help protect their systems and mission-critical customer data from security threats,” said Chris Babel, vice president and general manager, MSS, VeriSign. “VeriSign uses a vendor-agnostic approach to support best-of-breed devices. We provide continual monitoring and management, and gather unique insights from the data that comes from operating essential Internet infrastructure, to provide customers like ScottishPower with the intelligence they need to protect themselves from increasingly complex and malicious activities.”

Once fully deployed, VeriSign will manage and monitor hundreds of devices for ScottishPower, including firewalls, host and network-based intrusion detection systems. VeriSign will also provide vulnerability management services and consulting.

“ScottishPower increased our business with VeriSign because they are a leader in the MSS space,” said Graeme Agnew, IT security director, ScottishPower. “Our relationship with VeriSign enables us to benefit from expert advice, insight on malicious activity propagating across the global Internet network and world class 24/7 management and monitoring of our devices, providing exceptional value to our fast-paced and dynamic security program.”

VeriSign Managed Security Services enable the enterprise to proactively assess, monitor, manage and respond to security threats. The services combine real-time information, sophisticated analysis tools, and 24x7 operational monitoring and management support to provide integrated monitoring and management control over complex, heterogeneous networks. This approach allows the enterprise to leverage their existing IT investment, increase staff efficiency, implement early warning systems for business continuity, and proactively prioritize security activities and investment according to business risk.

About VeriSign 
VeriSign, Inc. (Nasdaq: VRSN) operates intelligent infrastructure services that enable businesses and individuals to find, connect, secure and transact across today’s complex global networks. Additional news and information about the company is available at http://www.verisign.com.

For more information, contact: 
VeriSign Media Relations: Brendan P. Lewis, brlewis@verisign.com, 650-426-4470 
VeriSign Investor Relations: Tom McCallum, tmccallum@verisign.com, 650-426-3744

Statements in this announcement other than historical data and information constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements involve risks and uncertainties that could cause VeriSign's actual results to differ materially from those stated or implied by such forward-looking statements. The potential risks and uncertainties include, among others, the uncertainty of future revenue and profitability and potential fluctuations in quarterly operating results due to such factors as the risk that VeriSign's announced strategic relationships, including the relationship described herein, may not result in additional products, services, customers, profits or revenues; and increased competition and pricing pressures. More information about potential factors that could affect the company's business and financial results is included in VeriSign's filings with the Securities and Exchange Commission, including in the company's Annual Report on Form 10-K for the year ended December 31, 2004 and quarterly reports on Form 10-Q. VeriSign undertakes no obligation to update any of the forward-looking statements after the date of this press release.

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