Chapter 6: Security & Risks

6.1 Physical Security of Cabling Infrastructure

The physical security of cabling infrastructure is often underestimated relative to camera placement and network security. An attacker who gains physical access to a cable or cabinet can intercept data, inject signals, or simply cut connectivity. All zone cabinets must be locked with key or electronic access control, and access logs should be maintained. Exposed cable runs in public-accessible areas must be protected with conduit or armored cable to prevent tampering and accidental damage.

6.2 Cybersecurity Risks in Surveillance Cabling

IP surveillance systems are increasingly targeted by cyber threats. The cabling infrastructure itself creates several cybersecurity risk vectors that must be addressed at the design stage. Unauthorized network access through unsecured switch ports, default credentials on cameras and switches, and unencrypted management traffic are the most common vulnerabilities. Network segmentation via VLANs, port security features (802.1X), and encrypted management protocols (SSH, HTTPS) are essential countermeasures.

6.3 EMI/EMC Risks and Mitigation

Electromagnetic interference (EMI) is a primary cause of intermittent camera dropouts, degraded video quality, and unexplained PoE power cycling. The most common EMI sources in surveillance environments include variable frequency drives (VFDs), fluorescent lighting ballasts, high-current power feeders, and elevator motor cables. Maintaining adequate separation distances and using shielded cable in high-EMI zones are the primary mitigation strategies.

6.4 Lightning and Surge Protection

Lightning-induced surges are the leading cause of mass camera failures in outdoor and perimeter deployments. A single lightning strike near a building can induce thousands of volts on copper cable runs, destroying cameras, switches, and patch panels simultaneously. The protection strategy relies on three layers: building lightning protection system (LPS), equipotential bonding of all metallic infrastructure, and surge protection devices (SPDs) at cable entry points.

Fiber optic backbones provide inherent galvanic isolation between buildings, eliminating the ground loop risk that makes copper inter-building runs so vulnerable. For any copper cable that exits a building or runs along an outdoor structure, SPDs must be installed at the building entry point on both the camera side and the switch side of the circuit.

6.5 Common Design Errors and Risk Register

The following table summarizes the most frequently encountered design and installation errors in surveillance cabling projects, their probability and impact, and recommended preventive actions. This risk register should be reviewed at the design stage and used as a checklist during installation and commissioning.