Network-1 Expands Management Team With Former Computer Associates/Cheyenne Software Executives

WALTHAM, Mass.–(BUSINESS WIRE)–April 22, 2002–

Names Jonathan Greene Senior Vice President of Marketing and Business Development, Jonna Stopnik Vice President of Alliances and Channel Development

Network-1 Security Solutions, Inc. (Nasdaq: NSSI), a technology leader in intrusion prevention software, announced today the addition of two key executives to the Company’s management team as part of its continuing efforts to position Network-1 for long-term success in the security software market. Jonathan Greene will oversee the Company’s product marketing strategy and business development activities. Jonna Stopnik will lead Network-1’s partnership and distribution channel development initiatives.

Mr. Greene brings more than 18 years experience in the software industry. Most recently, as the senior vice president of marketing, he developed product and marketing strategies for startup PANACYA, and while vice president of product marketing at System Management ARTS he created and implemented strategic marketing and business development plans for their network management analysis solutions. Beginning in 1993, Jon spent six years at Cheyenne Software, which was acquired by Computer Associates International (NYSE: CA) in 1997. His responsibilities included marketing and product strategy for directory management, storage, and security product lines.

Ms. Stopnik has an exceptional 19-year track record of sales, alliance and management experience in high-profile Internet and software infrastructure start-ups. Prior to joining Network-1, she was most recently the director of strategic alliances for Art Technology Group (Nasdaq: ARTG) and senior director of system integrator alliances for Broadvision (Nasdaq: BVSN). Jonna also served as vice president of sales for Solution-Soft Systems and as vice president of distribution channels for Cheyenne Software and later Computer Associates. Her considerable experience also includes senior management roles with Novell (Nasdaq: NOVL), Avnet Corporation (NYSE: AVT) and Xircom, a division of Intel (Nasdaq: INTC).

“Jon and Jonna bring an incredible level of experience, skill and energy to our management team and will play a critical role in extending the Company’s reach in the rapidly expanding end-point security market,” said Richard Kosinski, president and CEO of Network-1. “I look forward to working with them to leverage our leadership in workstation and server protection to establish new channels and business opportunities.”

About Network-1 Security Solutions, Inc.

Network-1 Security Solutions, Inc. (Nasdaq: NSSI) is a technology leader in server and workstation intrusion prevention software, combining firewall and intrusion detection capabilities directly on critical servers, desktops, and mobile computers. Distributed intrusion prevention protects against abuses by those with “insider access” and provides multiple layers of defense against breaches by outsiders. Security conscious organizations are using CyberwallPLUS as an integral component of their “defense in depth” security strategies. For additional details about the Company and its products visit, or call 800-NETWRK1 or 781-522-3400.

Certain of the above statements contained in this press release contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Actual results, events and circumstances (including future performance, results and trends) could differ materially from those set forth in such statements due to various factors, risks and uncertainties, including but not limited to, risks associated with the Company’s future growth and operating results, the uncertainty associated with obtaining sufficient financing, the uncertainty of market acceptance of the Company’s products, technological change, competitive factors and general economic conditions. Except as otherwise required to be disclosed in periodic reports required to be filed by companies registered under the Exchange Act by the rules of the Securities and Exchange Commission, the Company has no duty and undertakes no obligation to update such statements.

CyberwallPLUS is a trademark of Network-1 Security Solutions, Inc. All other product, trademark, company or service names mentioned are the property of their respective owners.

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