NW_20050511_VASCO’s Management Team To Be Present at Various Investor Conferences

May 11, 2005

OAKBROOK TERRACE, Ill., and BRUSSELS, Belgium, May 10, 2005 - VASCO Data Security International, Inc. (Nasdaq: VDSI) ( www.vasco.com ), a global provider of security products that enable e-business and e-commerce, today announced that its Chairman and CEO, Mr. Ken Hunt, and its CFO, Mr. Cliff Bown, will be presenting at various upcoming Investor Conferences.

On Tuesday, May 10th, Mr. Cliff Bown, VASCO’s CFO, will present at the Fifth Annual Software Investor Conference, sponsored by Kaufman Bros, LP, Inter-Continental The Barclay, New York, NY.

On Monday, May 16th, Mr. Ken Hunt, VASCO’s Chairman and CEO, and Mr. Cliff Bown, VASCO’s CFO, will present at the AeA Micro Cap Conference, Monterey Plaza Hotel, Monterrey CA.

On June 3rd, Mr. Ken Hunt will present at the Ninth Annual Growth Investor Conference, Friedman, Billings, Ramsey Co., Inc, Millennium Broadway Hotel,
New York.

For more information about the above-mentioned conferences, please contact VASCO at [email protected].

About VASCO: VASCO designs, develops, markets and supports patented user authentication products for the financial world, remote access, e-business and e-commerce. VASCO’s user authentication software is delivered via its Digipass hardware and software security products. With over 15 million Digipass products sold and delivered, VASCO has established itself as a world-leader for strong User Authentication with over 370 international financial institutions and approximately 1,700 blue-chip corporations and governments located in more than 80 countries.

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 2 456 9810, [email protected]