REPLOCK
Home & business security, made clear — locks and deadbolts, smart locks and keypads, cameras and alarms, and the tools to secure what matters.
From choosing a deadbolt grade and sizing a smart lock to planning camera coverage, setting up an alarm, picking a safe, and mapping who gets access, RepLock pairs free hands-on security tools with practical guides and a richly illustrated museum. Secure your home and business with confidence.
Home & Business Security Tools & Calculators
Free, hands-on tools to help you plan and improve your security — from locks and deadbolts to smart locks and keypads, cameras and CCTV, alarms, safes, and access control.
Keypad Combination Calculator
See how many codes a keypad lock or PIN pad can hold, and how long a brute-force attacker would need — with code length, keypad size, no-repeat rules, and lockout all in play
Security Camera Storage Calculator
Size the NVR/DVR drive your CCTV system needs from resolution, frame rate, recording hours, retention days, and camera count — in GB and TB, with a suggested drive size
Password Entropy Calculator
Measure a password's strength in bits of entropy from its length and character sets, and estimate how long an offline attacker would take to crack it at a chosen guessing speed
Camera Lens Coverage Calculator
Work out a security camera's horizontal field of view and how wide a scene it captures at a given distance, from its focal length and sensor size — real optics, no guesswork
Lock Grade Guide (ANSI/BHMA)
Compare ANSI/BHMA Grade 1, 2, and 3 for deadbolts and locksets on the exact cycle counts, forced-entry strikes, and strength each must pass — and which grade fits your door
Safe Rating Guide (UL Fire & Burglary)
Decode UL fire ratings (Class 350, 150, 125) and burglary ratings (RSC, TL-15, TL-30, TL-30x6) and filter them by whether you need fire protection, burglary protection, or both
Museum of Locks & Security
Wander an immersive museum of locks and security — the keys, padlocks, and deadbolts that guarded homes through the ages alongside the vaults, safes, and strongrooms of banks and businesses, and the alarms, cameras, and access systems that protect us today, each in its own gallery, so you can get to know the stories behind how we keep things safe: where each idea came from, what makes it matter, and the role it plays in security today.
Tour the museum →From the Journal
Fresh guides on locks and deadbolts, smart locks and keypads, cameras and CCTV, alarms and monitoring, safes, and access control, plus practical tips for hardening your doors and windows and securing both home and business.
The Invisible Fortress: Mastering Password Security in an Age of Cyber Threats
The Invisible Fortress: Mastering Password Security in an Age of Cyber Threats In today’s hyper-connected digital landscape, passwords serve as both gatekeepers and guardians of our most sensitive information. From…
The Essential Role of Locksmiths in Modern Security: A Deep Dive Into Their Services
The Essential Role of Locksmith Services in Modern Security Solutions In an era where security threats are evolving at unprecedented rates, locksmith services have transitioned from traditional trades to critical…
The Future is Keyless: Understanding Digital Keypad Locks in Modern Security Systems
The Future is Keyless: Understanding Digital Keypad Locks in Modern Security Systems Digital keypad locks are revolutionizing how we secure our homes and businesses by replacing traditional mechanical keys with…
The Future at Your Fingertips: Mastering Keyless Entry Locks for Modern Living
The Future at Your Fingertips: Mastering Keyless Entry Locks for Modern Living In an era where convenience meets security, keyless entry locks are revolutionizing how we access our homes and…
The Evolution of Door Lock Systems: From Ancient Mechanisms to Smart Security Solutions
Understanding the Fundamentals of Modern Door Lock Systems A door lock system is a mechanism used to secure entry points against unauthorized access. It typically consists of a latch, strike…
The Ultimate Defense: Understanding High-Security Locks for Modern Protection Needs
The Ultimate Defense: Understanding High-Security Locks for Modern Protection Needs In an era where security threats evolve at unprecedented speeds, traditional locking mechanisms are no longer sufficient to safeguard homes,…
Keep Learning
Practical know-how on locks, alarms, and cameras, plain-language explainers on lock grades, key systems, and how home security works, and seasoned tips for renters and property owners alike — everything you need to dig deeper and secure your space with confidence.
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