THE BLOCK: Gnosis Pay disclosed a data breach affecting its legacy system powering Gnosis Pay-branded debit cards, exposing certain customer information after unauthorized access was detected on Nov. 3. The company said it contained the incident within two hours, replaced compromised security credentials and addressed the vulnerability, adding that customer funds were not affected and its enterprise platform powering white-label card programs was untouched. Gnosis Pay has made 3D Secure verification mandatory for online card payments until the affected system is retired on Dec. 20.