EXHIBIT
23.1
The Board
of Directors
Network-1
Security Solutions, Inc.
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.
/s/ Radin, Glass & Co.,
LLP
Radin,
Glass & Co., LLP
New York,
New York
October
12, 2009