VASCO to Announce Second Quarter 2017 Financial Results July 27, 2017

OAKBROOK TERRACE, IL and ZURICH – July 3, 2017 — 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 second quarter 2017 financial results after market close Thursday, July 27, 2017.

On July 27, 2017 at 4:30 p.m. EDT/22:30 CEST, VASCO will host a conference call to discuss its second quarter 2017 financial results. A live webcast of the conference call will be available via the VASCO Investor Relations website at: 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.: 800-768-5901
• Dial-in international: + 1-212-231-2935