CyberSource 10-Q 2006
Certification Pursuant to 18 U.S.C. Section 1350, as Adopted
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
In connection with the periodic report of CyberSource Corporation (the Company) on Form 10-Q for the period ended June 30, 2006 as filed with the Securities and Exchange Commission (the Report), I, William S. McKiernan, Chief Executive Officer of the Company, hereby certify as of the date hereof, solely for purposes of Title 18, Chapter 63, Section 1350 of the United States Code, that to the best of my knowledge:
This Certification has not been, and shall not be deemed, filed with the Securities and Exchange Commission.