In this chapter, we will present two case studies that have utilized the feature of non-digital components to improve the security of a given system. We hope these works can inspire more following up works toward this direction and deepen our understandings over the security implications of non-digital components in computing systems.

Chapter Contents:

• 10.1 Introduction
• 10.2 Case study 1: Face Flashing—using light reflections to secure liveness detections
• 10.2.1 Architecture of face authentication systems
• 10.2.2 Attacks and solutions on liveness detection
• 10.2.3 Design of Face Flashing protocol
• 10.2.4 Key techniques
• 10.2.4.1 Model of light reflection
• 10.2.4.2 Face extraction
• 10.2.4.3 Timing verification
• 10.2.4.4 Face verification
• 10.2.5 Security analysis
• 10.2.5.1 Challenge–response elements
• 10.2.5.2 Security of timing verification
• 10.2.5.3 Security of face verification
• 10.2.5.4 Security against typical attacks
• 10.3 Case study 2: Secure mobile payment via imperfection of LCD screens
• 10.3.1 Physical feature of screens
• 10.3.2 Off-line QR payment
• 10.3.3 Adversary model
• 10.3.4 Generate screen fingerprint using brightness unevenness
• 10.3.4.1 Photo extraction and correction
• 10.3.4.2 Fingerprint extraction and comparison
• 10.3.5 Extension: anonymous screen authentication
• 10.3.5.1 Framework overview
• 10.3.5.2 Screen obfuscation
• 10.3.5.3 AnonPrint verification
• 10.4 Conclusion
• References

Inspec keywords: security of data

Other keywords: nondigital components; security implications; computing systems

Subjects: Data security; Security aspects of hardware