NW_20090105_en_VASCO to Update Full Year 2008 Revenue Guidance on January 6

OAKBROOK TERRACE, Illinois and ZURICH, Switzerland – January 05 2009 – 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 update its full year 2008 revenue guidance on January 06.

On January 06 before the opening of NASDAQ, VASCO will issue a press release.
On January 06 at 10 am EST, VASCO’s management team will host a conference call.

Conference Call Details
In conjunction with this announcement, VASCO Data Security International, Inc. will host a conference call tomorrow, January 6, 2009, at 10:00 a.m. EST - 16:00h CET.
To participate in this Conference Call, please dial one of the following numbers:

US/Canada dial in – 800-732-5617
International dial in – 212-231-2900

Mention the VASCO conference call to be connected.

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 approximately 8,000 companies in more than 100 countries, including more than 1,200 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,” “intended/meant,” 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 2609 97 00, [email protected]