Security, Privacy, and Usability in Continuous Authentication: A Survey.

Area of Science:

• Computer Science
• Information Security
• Human-Computer Interaction

Background:

• Continuous authentication uses sensor data (biometric, behavioral, contextual) for passive user verification.
• Transmitting personal data outside user control introduces significant privacy risks.
• Existing continuous authentication methods face security challenges, including poor matching rates and replay attack vulnerabilities.

Purpose of the Study:

• To provide a comprehensive overview of continuous authentication modes.
• To discuss the security, privacy, and usability issues associated with these modes.
• To compare privacy-preserving techniques and offer recommendations for improvement.

Main Methods:

• Literature review and survey of existing continuous authentication systems.
• Analysis of security vulnerabilities, privacy implications, and usability factors.
• Comparative study of different privacy-preserving approaches.

Main Results:

• Continuous authentication presents a trade-off between seamlessness and privacy/security.
• Key challenges include data privacy, matching accuracy, and susceptibility to attacks.
• Various privacy-preserving techniques exist, each with its own strengths and weaknesses.

Conclusions:

• Secure, privacy-preserving, and user-friendly continuous authentication requires careful design and implementation.
• Addressing privacy concerns and enhancing security are critical for widespread adoption.
• Further research is needed to develop robust and trustworthy continuous authentication systems.