January 4, 2007

OAKBROOK TERRACE, Ill., and BRUSSELS, Belgium, January 4, 2007 - VASCO Data Security International, Inc. (NASDAQ: VDSI), (www.vasco.com ), the global number one vendor of strong user authentication products, today announced that Allied Irish Bank (www.aib.ie ) will use Digipass 550 and VACMAN Controller to secure its customers’ assets. AIB is the first financial institution to use the brand new alphanumeric Digipass. This allows the transaction signature to be generated using both numeric and alpha characters, which are commonplace in both the BIC and the IBAN.

AIB Group is Ireland's leading banking and financial services organisation. It operates principally in Ireland, Britain, Poland and the USA. It employs more than 24,000 people worldwide in more than 750 offices.

VASCO's Digipass 550 is a PIN protected Digipass client authentication product that provides one-time passwords, e-signatures and unique host authentication. Learn more about Digipass 550 at http://www.vasco.com/digipass-550

AIB’s corporate and business customers in Ireland and the UK will be able to perform online banking transactions in an even more secure and user friendly way. To access their accounts, customers will be able to use a Digipass-generated one-time password. To secure online payments, AIB’s customers will be able to use the brand new and extra secure alphanumeric transaction signature functionality.

Transactions will be secured using elements of the Account No. (or IBAN) and the beneficiary BIC (or Sort code), including alphanumeric characters. Based on these details, Digipass 550 will generate a transaction data signature, which the user must input for validation by the VACMAN server. The combination of Digipass generated one-time password and transaction signature offers leading edge protection against phishing and man-in-the-middle attacks.

The alphanumeric Digipass functionality is the result of key collaboration between AIB and VASCO. VASCO has developed this brand new functionality à la carte, at the request of the customer. VASCO continues to prove its claim of being the full option, all-terrain authentication company.

“Our customers’ security is of paramount importance to AIB, however the collective challenge we faced was to ensure we employed a solution which would also be in line with SEPA”, said Seán Jevens, Head of eChannel Development with AIB. “We opted for VASCO because of their track record in the financial sector and for their open and flexible approach. VASCO’s VACMAN Controller and Digipass products fully meet that description.”

“AIB is the first financial institution to offer its corporate customers alphanumeric Digipass transaction signatures,” said Jan Valcke, VASCO’s President and COO. “We developed the new Digipass alpha signing functionality in collaboration with our customer. This partnership approach is one of the strongest assets of VASCO and will lead to a more secure Internet environment for AIB’s customers.”

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:
Jochem Binst, +32 2 609 97 40, jbinst[at]vasco[dot]com