iSign Solutions (ISGN) 10-Q 2005 Q2 Quarterly report

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Communication Intelligence Corporation (the “Company”) on Form 10-Q for the quarterly period ended June 30, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Guido DiGregorio, Chairman and Chief Executive Officer, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes Oxley Act of 2002, that to the best of my knowledge:

(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 results of operations of the Company.

Date: August 11, 2005

By:/s/Guido DiGregorio

Chairman and Chief Executive Officer