RESTON, Va. September 28, 2000 Ztango, a Wireless Application Service Provider
(W-ASP) providing wireless extension and wireless application solutions to network operators, e-companies, and corporations, today announced that it has licensed RSA BSAFE� Crypto-C software from RSA Security Inc. (NASDAQ:RSAS) for its Wireless Application Protocol (WAP) gateway product. By including RSA Securitys software in its gateway solution, Ztango is able to deliver end-to-end secure communications for a wide variety of applications, commerce and financial services.

The combination of WTLS, SSL and RSA BSAFE� Crypto-C software, provides the necessary end-to-end security that has been proven and widely accepted in the industry by corporations, developer communities and commerce providers. In the current 1.2 release of the Ztango WAP Gateway, WTLS Class 1 and Class 2 are supported with best in breed cryptographic solutions from RSA Security. In anticipation of the supported functionality in WAP devices, the support for WTLS Class 3 in the Ztango WAP Gateway is planned for later this year.

The Ztango product suite brings advanced wireless data services to wireless phones and other wireless terminals, in line with goals established by the industry association that regulates the Wireless Application Protocol (WAP), the WAP Forum. The RSA BSAFE� line of security software helps sensitive information to be communicated between the WAP terminal and the application/service in a secure environment.

The wireless arena is moving rapidly to empower users, and Ztangos gateway is a part of this movement to deliver wireless services to network operators, e-companies and corporations, said Scott Schnell, senior vice president of Marketing at RSA Security. We are pleased that Ztango has selected RSA Security software to enable the security component of its WAP solution.

We consider RSA Security to be the industrys leading provider of security software, and are proud to be working with them, said John R. Harris, Chairman and CEO of Ztango. The RSA Security software solution helps sensitive information to be communicated between the WAP terminal and the application in a secure environment. This not only enhances the value of the Ztango WAP Gateway product, but also provides the same benefits to Ztango customers that are subscribed to the Ztango WASP offering.

The RSA BSAFE� line of security software is embedded in todays most successful Internet applications, including Web browsers, wireless devices, commerce servers, e-mail systems and virtual private network products. Built to provide implementations of standards such as SSL, SMIME, WTLS, IPSec and PKCS, RSA BSAFE� products can save developers time and risk in their development schedules.

About RSA Security Inc.
RSA Security Inc., The Most Trusted Name in e-Security, helps organizations build secure, trusted foundations for e-business through its RSA SecurID� two-factor authentication, RSA BSAFE� encryption and RSA Keon� digital certificate management systems. With more than a half billion RSA BSAFE-enabled applications in use worldwide, more than seven million RSA SecurID users and almost 20 years of industry experience, RSA Security has the proven leadership and innovative technology to address the changing security needs of e-business and bring trust to the new, online economy. RSA Security can be reached at www.rsasecurity.com.

About Ztango
Ztango Inc., a Wireless Application Service Provider (W-ASP), delivers wireless extension and wireless application solutions to network operators, e-companies, and corporations via an advanced, secure hosting facility and global network. The company recently received $37.8 million in equity capital from General Atlantic Partners, LLC, a leading global investor in Internet, Internet-enabled, and information technology businesses. Ztango was the 8th member to join the WAP Forum and is headquartered in Herndon, Virginia, with offices in New York, San Francisco, London, Brussels, and Helsinki. For more information about Ztango, visit www.ztango.com.

RSA, BSAFE, Keon and SecurID are registered trademarks, and The Most Trusted Name in e-Security is a trademark of RSA Security Inc. All other products and services mentioned are trademarks of their respective companies.