Query-Based Authentication
A system that authenticates users based on database queries and their responses.
Understanding:
Query-Based Authentication (QBA) is a technique where users must correctly respond to dynamically generated queries to authenticate their identity. Instead of relying solely on passwords, QBA provides an additional layer of security through user-specific or system-generated challenges
Common Applications and Use Cases:
Banking & Financial Services – Used in online banking for risk-based authentication.
API & Web Security – Protects API endpoints from unauthorized access.
Multi-Factor Authentication (MFA) Enhancements – Adds a second authentication factor by requiring real-time query responses.
Best Practices and Security Considerations:
Use Non-Repetitive Queries – Prevent attackers from memorizing answers over time.
Ensure Time-Sensitive Authentication – Implement expiration for query-based responses to prevent replay attacks.
Combine with Behavioral Biometrics – Use machine learning to analyze user responses for anomalies.