VASCO to Announce Fourth Quarter and Fiscal Year 2017 Financial Results February 21, 2018

OAKBROOK TERRACE, IL and ZURICH – January 5, 2018 -- VASCO Data Security International, Inc. (NASDAQ: VDSI), a global leader in digital solutions including identity, security and business productivity, announced today that it will release its fourth quarter and fiscal year 2017 financial results after market close Wednesday, February 21, 2018.

On February 21, 2018 at 4:30 p.m. ET/22:30 CET, VASCO will host a conference call to discuss its fourth quarter and fiscal year 2017 financial results. A live webcast of the conference call will be available via the VASCO Investor Relations website at: ir.vasco.com. Shortly after the conclusion of the call, a replay of the webcast will be available at the same website.

Dial-in telephone numbers for the conference call are:

• Dial-in U.S.: 800-659-9004
• Dial-in international: + 1-303-223-4368