BioTouch: Reliable Re-Authentication via Finger Bio-Capacitance and Touching Behavior

Area of Science:

• Computer Science
• Cybersecurity
• Human-Computer Interaction

Background:

• Continuous re-authentication is crucial for device security, particularly against insider threats.
• Existing methods struggle to balance accuracy, transparency, and robustness.
• Biometric features lack transparency; behavioral features lack accuracy and robustness.

Purpose of the Study:

• To propose BioTouch, a novel re-authentication scheme addressing limitations of current approaches.
• To achieve accurate, transparent, and robust user verification during device usage.

Main Methods:

• BioTouch integrates finger bio-capacitance and touching behavior for multi-feature user identification.
• The system operates automatically during user interaction on capacitive-touch devices.
• Finger bio-capacitance ensures robustness across different user positions and motions.

Main Results:

• BioTouch successfully flags 98% of anomalous behaviors within ten touch operations.
• The scheme achieves a high accuracy rate of up to 99.84% during active usage.
• Demonstrated proof-of-concept through implementation and comprehensive evaluations.

Conclusions:

• BioTouch provides a reliable and effective solution for continuous re-authentication.
• The proposed method significantly improves device security by enhancing accuracy and transparency.
• BioTouch offers a robust approach resilient to varying usage conditions and user movements.