WWW.EXFILE.COM, INC. -- 888-775-4789 -- NETWORK-1 SECURITY SOLUTIONS, INC. -- EXHIBIT 23.1 TO FORM S-8

We consent to the reference to our firm under the caption “Experts” in the Registration Statement on Form S-8 (of which this consent is filed as Exhibit 23.1) pertaining to the Network-1 Security Solutions, Inc. and to the incorporation by reference therein of our report dated March 25, 2009 related to the financial statements of Network-1 Security Solutions, Inc. for the year ended December 31, 2008 and December 31, 2007 included in its Annual Report on Form 10-K for the year ended December 31, 2008 filed with the Securities and Exchange Commission.