EXHIBIT
23.1
CONSENT
The Board
of Directors
Network-1
Security Solutions, Inc.
We
consent to the incorporation by reference in the Registration Statements on Form
S-8 Nos. 333-140622 and 333-162640 of Network-1 Security Solutions, Inc. of our
report dated April 8, 2010, related to the financial statements of Network-1
Security Solutions, Inc. for the years ended December 31, 2009 and 2008 included
in its Annual Report on Form 10-K for the years ended December 31, 2009 and 2008
filed with the Securities and Exchange Commission.
/s/ Radin, Glass & Co.,
LLP
Radin,
Glass & Co., LLP
Certified
Public Accountants
New York,
New York
April 8,
2010