Rainbow Adds Microsoft .NET Support for Sentinel Software Security

Industry’s Drivers Provide a Communications Path Between the Sentinel Key and the Protected Application

IRVINE and SAN DIEGO, Calif., April 15, 2002 – Rainbow eSecurity, a Rainbow Technologies, Inc. (Nasdaq: RNBO) company and a leading provider of digital content and transaction security solutions for the Internet, eCommerce and software protection, announced at today’s 2002 Software & Information Industry Annual conference that Rainbow’s industry-leading Sentinel software security solutions family now secures applications developed for Microsoft’s .NET platform. This support extends to Sentinel SuperPro and SuperProNet software security tokens, which achieved Windows Hardware Quality Labs certification from Microsoft last year.

Sentinel hardware keys can protect any software application developed for the .NET platform and Rainbow has developed drivers that protect any application designed for any Windows 9x/NT/2000 operating system environment.

“As new and powerful software development platforms like .NET emerge, its important to provide customers with the proven technology and solutions to secure applications developed for these new development environments,” said David M. Lynch, vice president of marketing, Rainbow eSecurity. “The optimization of our industry-leading Sentinel product line to support new operating systems and development platforms is an ongoing priority for us and we are pleased to offer .NET support and lead in the efforts to secure applications built for this platform.”

The Sentinel Suite of Products

The Sentinel product family enables software security for ISVs and software developers through secure hardware and software-based license software distribution and management tools. Sentinel secures applications from unauthorized execution and protects developers and ISVs from illegal licensing and distribution. These products represent the industry’s most powerful and flexible solution for securing critical applications in stand-alone or networked environments. Rainbow’s eSecurity group markets the industry’s leading software security, electronic software licensing and management, and digital rights management solution.

Rainbow’s Sentinel solutions provide the tools to enable:

· Digital Rights Management (DRM) for software and applications

· Electronic License Distribution/Management (ELD/M)

· Electronic Software Distribution (ESD)

· Electronic Commerce Licensing Tools and Security

Rainbow has sold more than 28 million smart tokens to date, securing more applications for more users than any other company in the industry.

About Rainbow Technologies

Founded in 1984, Rainbow Technologies is a leading provider of digital content and transaction security solutions for the Internet, eCommerce and mCommerce. Rainbow applies its core technology to a variety of Internet applications-from securing software, to the acceleration of secure communication for eCommerce and VPNs. Rainbow’s products include secure Web server and VPN acceleration boards; anti-piracy and Internet software distribution solutions; PKI security solutions; voice, data and satellite security systems; and USB-based authentication tokens. The company’s headquarters are in Irvine, California, and maintains offices throughout the United States, United Kingdom, France, Germany, Australia, China, Japan, India, The Netherlands, Brazil, Mexico and Taiwan. A network of nearly 80 authorized distributors sells Rainbow products worldwide. For more information, visit our Web site at www.rainbow.com.

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Rainbow Technologies, Sentinel, SuperPro, SuperProNet, SentinelLM and SentinelExpress are trademarks of Rainbow Technologies.

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information included in our Annual Report on Form 10-K and other materials filed with the Securities and Exchange Commission (“SEC”) (as well as information included in oral statements or other written statements made or to be made by the Company) contain statements relating to the following: dependence upon existing and new product offerings, competition, intellectual property and licensing, future growth, rapid technological and market change, manufacturing and sourcing risks, Internet infrastructure and regulation, the inclusion of network security functionality in hardware or system software, international operations, among others. These conditions involve important factors that could cause actual results to differ materially from those expressed in any forward-looking statements made by or on behalf of the Company. Any forward-looking statements are made pursuant to the Private Securities Litigation Reform Act of 1995 and, as such, speak only as of the date made. Statements made in this document that are not purely historical are forward-looking statements, including any statements as to beliefs, plans, expectations, or intentions regarding the future. The Company assumes no obligation to update information concerning its expectations.

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