NW_20061206_en_VASCO Strengthens Enterprise Security Offerings with VACMAN Middleware 3.0

December 6, 2006

OAKBROOK TERRACE, Ill. and BRUSSELS, BELGIUM— December 6, 2006 -- VASCO Data Security International, Inc. (www.vasco.com) (Nasdaq: VDSI), the global number one vendor of strong user authentication and e-signature products, today launched VACMAN Middleware 3.0, the authentication server backbone of its Enterprise Security products.

As the Full Option, All-Terrain Authentication Company, it is VASCO’s mission to make its products available for any type of company or institution. VACMAN Middleware 3.0 fits perfectly in this strategy. VASCO’s server side authentication product aims at any enterprise or institution, from the smallest SME (Small & Medium Sized Enterprise) to the largest Fortune 500-company. The ease of implementation and management are important assets of VACMAN Middleware, making it a truly hassle-free authentication engine.

Important features of VACMAN Middleware are:
- works in both RADIUS and Web environments;
- supports all Digipass client authentication products;
- ease of integration: VACMAN Middleware can be installed
in 30 minutes time;
- easy to administer and to audit;
- Virtual Digipass (one-time password via text message) support;
- enhanced active directory
- available from 10 to more than 10,000 users

“With VACMAN Middleware 3.0 we strengthen our authentication offerings for the Enterprise Security sector,” said Jan Valcke, VASCO’s President and COO. “We expect that VACMAN Middleware will make us even more successful in that important market segment.”

VACMAN Middleware will be immediately available via VASCO’s global indirect sales network of distributors and resellers.

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 28 million Digipass products sold and delivered, VASCO has established itself as a world-leader for strong User Authentication with over 550 international financial institutions and approximately 3,300 blue-chip corporations and governments located in more than 100 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:
VASCO: Jochem Binst, +32 2 609 97 00, [email protected]