CyberSource(R) Powers Amazon.com / Amazon.com Payments Leverages CyberSource Internet Fraud Screen and Credit Card Payment Services - WITH PHOTO -

SAN JOSE, Calif. (PROTEXT) - CyberSource Corporation (Nasdaq: CYBS), a leading developer and provider of real-time eCommerce transaction services, today announced that it has signed a contract with Amazon.com (Nasdaq: AMZN), to provide the CyberSource Internet Fraud Screen and Credit Card Services. (Photo: http://www.newscom.com/cgi- bin/prnh/19990513/CYBRSOURCELOGO ) "CyberSource's goal is to provide mission critical eCommerce transaction services that enable merchants to sell successfully on-line," said Bill McKiernan, CyberSource's founder, Chairman and CEO. "By working with Amazon.com, CyberSource enables one of the Internet's largest retailers to offer individuals the ability to buy and sell on the Internet in a whole new way." About CyberSource Internet Commerce Suite The CyberSource Internet Commerce Suite(SM)) is a robust set of real-tim eCommerce transaction services that enable merchants to automate commerce operations, gaining the benefits of outsourcing complex Internet commerce transaction infrastructure while maintaining flexibility and control. Through software installed on a commerce server, merchants remotely access all CyberSource services, including: Credit Card Services, Tax Calculation, Internet Fraud Screen enhanced by Visa, Fulfillment Messaging, Delivery Address Verification, Digital Delivery, Digital Warehousing, Policy Compliance, and Export Compliance. About CyberSource CyberSource is a leading developer and provider of eCommerce transaction services, and a pioneer in the area of Internet fraud detection. More than 600 Internet merchants in more than 26 countries have chosen to use CyberSource services. CyberSource provides mission-critical reliability with the CyberSource Internet Commerce Suite(SM), offering merchant-controlled, real- time services including Payment Services, Tax Services, Risk Management Services, Distribution Control Services, and Fulfillment Management Services. Customers of CyberSource include leading Internet merchants and business selling on-line including Beyond.com, BUY.COM, Casio, Compaq Computer, Egghead.com, Nike.com, Remedy and Shopping.com. For more information visit http://www.cybersource.com or email to info@cybersource.com or ir@cybersource.com CyberSource is a U.S. registered trademark. CyberSource Internet Commerce Suite is a service mark of CyberSource Corporation. All other brands and product names are trademarks or registered trademarks of their respective companies. ots Original Text Service: CyberSource Corporation Internet: http://www.newsaktuell.de CONTACT: Sam Paior of CyberSource Corporation, 408-260-6058, or samp@cybersource.com/ Photo: NewsCom: http://www.newscom.com/cgi- bin/prnh/19990513/CYBRSOURCELOGO AP Archive: http://photoarchive.ap.org PRN Photo Desk, 888-776-6555 or 201- 369-3467/ Company News On-Call: http://www.prnewswire.com/comp/107369.html or fax, 800-758-5804, ext. 107369/ Web site: http://www.cybersource.com http://www.amazon.com/ Subscribers please note that material bearing the slug "PROTEXT" is not part of CTK's news service and is not to be published under the "CTK" slug. Protext is a commercial service providing distribution of press releases from clients, who are identified in the text of Protext reports and who bear full responsibility for their contents. PROTEXT