Digital Optical Key Decoding: Protection Against Smartphone Photo Duplication
Engineering Overview: Technical guide on designing key bitting profiles with hidden undercuts, dual angles, and stepped paracentric profiles immune to smartphone photo decoding.
Technical & Engineering Specifications
| Standard | VdS Commercial High Security |
|---|---|
| Key Security | Impossible to decode from flat 2D photographs |
| Security Threat | 2D Optical Camera Scanning & Smartphone App Decoding |
| Defensive Architecture | Compound-Angle Dimple Cuts & Internal Wave Grooves |
The Smartphone Photo Decoding Threat
High-resolution smartphone cameras allow attackers to photograph a key lying on a desk and decode bitting depths with mobile apps.
Anti-Optical Design Features
- Angled Dimple Cuts: Bitting dimples milled at compounding $15^\circ$ left/right angles that cannot be measured from 2D photos.
- Hidden Internal Undercuts: Critical locking elements positioned inside laser-milled side channels invisible from the outside.
Frequently Asked Engineering & Selection Questions
Q1: How can lock keys be protected against smartphone photo copying?
By using angled dimple cuts and internal wave grooves that cannot be visually measured or decoded from a flat 2D photograph.