from SC 13G
1 page
<page> 1 Exhibit 1 Joint Filing Agreement This Will Confirm the Agreement by and Between Each of the Undersigned, in Accordance With Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, as Amended, That the Schedule 13g Filed on or About This Date With Respect to the Beneficial Ownership of the Undersigned of Shares of the Common Stock, Par Value $.01 Per Share, of Intrusion.com, Inc., Is Being Filed on Behalf of Each of the Undersigned. This Agreement May Be Executed in Two or More Counterparts, Each of Which Shall Be Deemed an Original, but All of Which Together Shall Constitute One and the Same Instrument. Dated: September 22, 2000 Science Applications International Corporation By: /S/ Douglas E. Scott Name: Douglas E. Scott Title: Senior Vice President and General Counsel Saic Venture Capital Corporation. By: /S/ Ira J. Miller Name: Ira J. Miller Title: President Page 9 of 9
