VASCO To Release Q4 and Full Year 2009 Results On February 18, 2010_

Followed by Analyst & Investor Summit in New York

OAKBROOK TERRACE, Illinois and ZURICH, Switzerland – January 8, 2010 – VASCO Data Security International, Inc. (Nasdaq: VDSI; www.vasco.com), a leading software security company specializing in strong authentication products, announced today that it will release its Q4 and Full Year 2009 results on February 18, 2010.

On February 18, at 10.00 am ET/16.00 CET, VASCO will hold a conference call, which will be streamed on the VASCO website (www.vasco.com).

The conference call will be held in New York City, followed from 11:30 am onwards by VASCO’s 2010 Analyst and Investor Summit. More information about this event will be posted on the VASCO website soon.

The dial-in telephone numbers for the conference call will be announced shortly.

Mr. T. Kendall Hunt, Chairman and CEO, Mr. Jan Valcke, President and COO and Mr. Cliff Bown, Executive Vice President and CFO of VASCO, will be available on February 18 to answer analyst, investor and media questions.

VASCO is a leading supplier of strong authentication and e-signature solutions and services specializing in Internet Security applications and transactions. VASCO has positioned itself as global software company for Internet Security serving a customer base of over 9,000 companies in more than 100 countries, including almost 1,350 international financial institutions. VASCO’s prime markets are the financial sector, enterprise security, e-commerce and e-government.

Forward Looking Statements:
Statements made in this news release that relate to future plans, events or performances are forward-looking statements. Any statement containing words such as “believes,” “anticipates,” “plans,” “expects,” “intend,” “mean,” and similar words, is forward-looking, and these statements involve risks and uncertainties and are based on current expectations. Consequently, actual results could differ materially from the expectations expressed in these forward-looking statements.

Reference is made to the VASCO's public filings with the U.S. Securities and Exchange Commission for further information regarding VASCO and its operations.

This document may contain trademarks of VASCO Data Security International, Inc. and its subsidiaries, including VASCO, the VASCO “V” design, DIGIPASS, VACMAN, aXsGUARD and IDENTIKEY.

For more information contact:
Jochem Binst, +32 2 609 97 00, [email protected]