5 THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM AUDITED FINANCIAL STATEMENTS OF NETWORK-1 SECURITY SOLUTIONS, INC. FOR THE YEAR ENDED DECEMBER 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. US DOLLARS 12-MOS DEC-31-1998 DEC-31-1998 1 6,423,000 0 400,000 151,000 15,000 6,791,000 903,000 488,000 8,168,000 929,000 0 0 6,000 44,000 7,189,000 8,168,000 569,000 1,831,000 699,000 1,489,000 4,829,000 136,000 1,154,000 (5,777,000) 0 (5,777,000) 0 0 0 (5,777,000) (2.56) (2.56)