EXHIBIT 99.1
                                                                    ------------

FOR IMMEDIATE RELEASE

  Corey M. Horowitz, Chairman and CEO
  Network-1 Security Solutions, Inc.
  (212) 829-5770

              NETWORK-1 COMMENCES PATENT LITIGATION AGAINST D-LINK
                  CORPORATION AND D-LINK SYSTEMS, INCORPORATED

     NEW YORK, AUGUST 11, 2005 - Network-1 Security Solutions, Inc. (OTCBB:
NSSI.OB) announced today that it has initiated patent litigation against D-Link
Corporation and D-Link Systems, Incorporated ("D-Link") in the United States
District Court for the Eastern District of Texas, Tyler Division, for
infringement of United States Patent No. 6,218,930 (the "930 Patent").

     The `930 Patent, entitled "Apparatus and Method for Remotely Powering
Access Equipment Over a 10/100 Switched Ethernet Network", relates to several
key technologies underlying the delivery or receipt of power over data
communications networks, including products compliant with the IEEE 802.3af
Power Over Ethernet (PoE) standard that was approved in June 2003 by the
Institute of Electrical and Electronic Engineers. PoE governs the delivery of
power over Ethernet cables in order to remotely power network connected devices
including wireless access points, RFID card readers, VOIP telephones and network
cameras. The `930 Patent was granted by the United States Patent and Trademark
Office on April 17, 2001 and expires on March 7, 2020.

     "All of our good faith attempts to engage D-Link in licensing negotiations
have been unsuccessful which left us no choice but to initiate this action,"
said Corey M. Horowitz, Chairman and CEO of Network-1. "While we prefer
licensing the `930 Patent to the PoE industry without the distraction and cost
of litigation, we will take whatever action is necessary to protect our
intellectual property rights and maximize shareholder value."

     Network-1 has retained Blank Rome LLP, a national law firm, and Potter
Minton PC, of Tyler Texas, as its local counsel, to represent it in the
litigation. Blank Rome has agreed to work on a contingency fee basis.


     "The engagement of law firms of such quality and reputation to pursue
infringement claims under the `930 Patent further strengthens our ability to
protect our intellectual property", commented Mr. Horowitz. "It also underscores
the strong belief these high quality law firms share with us in the legitimacy
of our claims."




ABOUT NETWORK-1 SECURITY SOLUTIONS, INC.

     Network-1 Security Solutions, Inc. is engaged in the acquisition,
development, licensing and protection of its intellectual property and
proprietary technologies. The Company owns six patents covering various
telecommunications and data networking technologies. As part of its business
strategy it is offering licenses to third parties who Network-1 believes could
benefit from the technologies covered by its patents.

THIS RELEASE CONTAINS FORWARD-LOOKING STATEMENTS WITHIN THE MEANING OF THE "SAFE
HARBOR"PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995. THESE
STATEMENTS ADDRESS FUTURE EVENTS AND CONDITIONS CONCERNING THE COMPANY'S
BUSINESS PLANS. SUCH STATEMENTS ARE SUBJECT TO A NUMBER OF FACTORS AND
UNCERTAINTIES, SUCH AS FUTURE ECONOMIC CONDITIONS, TECHNOLOGY CHANGES, THE
ABILITY OF NETWORK-1 TO OBTAIN LICENSE AGREEMENTS FROM THIRD PARTIES FOR ITS
PATENT PORTFOLIO, UNCERTAINTY OF PATENT LITIGATION, THE COMPANY'S ABILITY TO
ACHIEVE REVENUES AND PROFITS FROM ITS PATENT PORTFOLIO, AND LEGISLATIVE,
REGULATORY AND COMPETITIVE DEVELOPMENTS. SEE THE COMPANY'S CURRENT REPORT ON
FORM 8-K FILED WITH THE SECURITIES AND EXCHANGE COMMISSION FOR ADDITIONAL
INFORMATION ON THE TERMS OF ITS RETENTION OF BLANK ROME LLP. EXCEPT AS OTHERWISE
REQUIRED TO BE DISCLOSED IN PERIODIC REPORTS, THE COMPANY EXPRESSLY DISCLAIMS
ANY FUTURE OBLIGATION OR UNDERTAKING TO UPDATE OR REVISE ANY FORWARD-LOOKING
STATEMENT CONTAINED HEREIN.