Shield n Shelter

Independent Security Knowledge Base

Free Security Guides, Blueprints & Printable Toolkits

Engineering-grade resources, printable PDF checklists, optical calculation frameworks, and smart home privacy blueprints — 100% free, vendor-neutral, and updated for 2026.

3 Downloadable PDF Handbooks
100% Free & Zero Paywalls
Certified Engineering Review
Featured Editorial Guide + PDF

Home Camera Placement Guide For Homeowners: 8 Best Installation Places

Stop buying cameras and start buying coverage. Master the D.O.R.I. optical framework (Detection, Observation, Recognition, Identification), 8 critical exterior zones, height elevation rules (7-9 ft), and eliminate dangerous wedge-angle blind spots.

D.O.R.I. Optical Matrix

Detection • Observation • Recognition • Identification with calculated mounting elevations & sightline geometry.

Explore All Security Guides

Comprehensive, actionable guides written by independent residential security consultants.

Move-In & Property Access

Move-In Security Checklist

A 4-stage, 21-point protocol to fortify your new home before unpacking. Covers lock rekeying, sensor setup, life safety, and tenant guidelines.

9 Min Read PDF Available
IoT & Network Privacy

Smart Home Privacy Guide

Do the walls really have ears? Learn how to isolate smart home devices on an IoT VLAN, secure local NVR recordings, and prevent cloud leaks.

10 Min Read PDF Available
Offline Study Resources

Download Free PDF Security Blueprints

Printable, ad-free handbooks engineered for offline study, DIY installation planning, and property defense auditing.

Home Camera Placement Guide (PDF)

8-Zone Residential Camera Placement Blueprint & D.O.R.I. Optical Handbook • 8.4 KB

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Move-In Security Checklist (PDF)

21-Point Day-One Move-In Protocol & Property Hardening Checklist • 6.4 KB

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Smart Home Privacy Guide (PDF)

IoT VLAN Isolation, Local NVR Storage & Digital Defense Architecture • 6.5 KB

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Our Engineering Philosophy

Why Our Resources Are Different

$0 Commission & No Sponsors

We do not sell hardware, take affiliate kickbacks, or push expensive monitoring contracts. Our blueprints rely on geometry, optics, and network architecture.

Architect-Grade Precision

Every guide follows the 5 concentric layers of residential security (Perimeter, Exterior, Access Points, Interior, Life Safety) tested across all 50 U.S. states.

Privacy-First Engineering

We champion local encrypted storage (NVR/NAS) and VLAN segmentation, ensuring your security system never leaks private video feeds to third parties.

Need a Custom Blueprint For Your Floor Plan?

Our certified engineers audit your home live over video call, map out exact camera focal lengths, and deliver prioritized fixes at 3 budget tiers within 48 hours.

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