VASCO To Release Q1 2010 results on April 27 – Dial-in Information

OAKBROOK TERRACE, Illinois and ZURICH, Switzerland –April 22, 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 Q1 2010 results on April 27, 2010.

On April 27, at 10:00 am EDT/16:00 CET, VASCO will hold a conference call, which will be streamed on the VASCO website (www.vasco.com).

The dial-in telephone numbers for the conference call are:
US: 800-734-4208
International: +1-212-231-2902

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 April 27 to answer analyst, investor and media questions.

About VASCO

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 almost 9,500 companies in more than 100 countries, including approximately 1,400 international financial institutions. VASCO’s prime markets are the financial sector, enterprise security, e-commerce and e-government.