NW_20070606_VASCO Included in Crain’s Fast 50 List of Chicago Area

OAKBROOK TERRACE, Ill., and ZURICH, Switzerland, June 6, 2007 - VASCO Data Security International, Inc. (Nasdaq: VDSI) (www.vasco.com), the leading software security company specializing in authentication products, today announced that it has been included in Crain’s Fast 50, the list of the 50 quickest growing companies in the Chicago area (http://www.chicagobusiness.com/cgi-bin/fastfifty.pl). VASCO obtained the 31st position in the list.



About VASCO: VASCO is the number one supplier of strong authentication and e-signature solutions and services. VASCO has established itself as the world’s leading software company specialized in Internet Security, with a customer base of over 4,800 companies in more than 100 countries, including close to 750 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,” 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 Company's public filings with the US Securities and Exchange Commission for further information regarding the Company and its operations.

For more information contact:
Jochem Binst, +32 2 609 97 40, [email protected]