EXHIBIT 99.1

                         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 Quarterly Report of Blue Coat Systems, Inc. (the
"Company") on Form 10-Q for the period ending October 31, 2002 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Brian
NeSmith, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002, that:

          (1) The Report fully complies with the requirements of section 13(a)
or 15(d) of the Securities Exchange Act of 1934; and

          (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and result of operations of the
Company.

                                                     /s/ Brian NeSmith
                                                     -------------------
                                                     Brian NeSmith
                                                     Chief Executive Officer
                                                     Blue Coat Systems, Inc.
                                                     December 16, 2002