How does Mastercard define Account Data Compromises (ADC)?

Mastercard defines Account Data Compromises (ADC) as security violations that involve card and account data. This definition emphasizes the focus on the integrity and protection of sensitive payment information, indicating that an ADC occurs when there is unauthorized access to or exposure of this data, leading to potential fraud or financial loss.

This definition is crucial for understanding how breaches in security can have widespread consequences, affecting not just individual consumers, but also financial institutions and the overall payment ecosystem. ADC encompasses various types of incidents, including hacking or data breaches where sensitive account data is accessed by unauthorized individuals, thus posing a significant risk to all stakeholders involved in electronic transactions.

The other options suggest various scenarios related to credit card use and transactions, but they don't capture the specific essence of what constitutes an Account Data Compromise. Only option B directly pertains to the core issue of security violations affecting card and account data.