If your business is still using the same thick, plastic “clamshell” keycards you’ve had for a decade, your front door is less secure than you think. In the world of physical security, 2026 should be treated as the practical “end of life” for legacy 125kHz proximity technology.
What was once a reliable standard has become a vulnerability that inexpensive, widely available tools can exploit.
The 125kHz Problem: Cloned in Seconds
The “Prox” cards that many Philadelphia and New Jersey businesses still rely on are fundamentally limited. They transmit their data—your unique user ID—without modern encryption and without a secure, encrypted handshake with the reader.
That means an attacker who can capture that ID can duplicate it onto another credential. To your access control system, the duplicate can look identical to an authorized badge.
This isn’t a theoretical risk for businesses with high foot traffic, shared lobbies, or frequent visitors. It’s a real-world exposure that often goes unnoticed until there’s an incident.
A Simple Reality Check for Business Owners
If you’re not sure what credential type you’re using, start with a basic question: are your badges labeled “Prox” or 125kHz? If so, it’s worth treating your credential technology as a security priority—not an afterthought.
The goal isn’t to panic. It’s to recognize that legacy credentials were designed for convenience in a different era, not for today’s threat environment.
The Rise of the Smart Credential
To address this, the industry has shifted toward smart credentials (13.56MHz) and mobile access.
- Encrypted handshakes: Modern credentials use encryption to authenticate with the reader. Even if data is intercepted, it’s not usable in the same way as legacy Prox IDs.
- Mobile credentials: Moving keys to a smartphone or Apple Watch can add stronger identity controls. If a device is lost, access can be revoked quickly—without rekeying doors or reissuing physical cards.
The Cloud-First Advantage
At Systems Integrations, we specialize in migrating businesses to modern, cloud-based platforms like ProdataKey (PDK) and Rhombus. For businesses operating across multiple sites—for example, a headquarters in Philadelphia with satellite offices in Florida or Delaware—the benefits are significant:
- No on-site servers: Legacy systems often rely on a “box in the closet” that requires ongoing patching and maintenance. Cloud-first systems reduce that burden and eliminate a common point of failure.
- Encrypted communications: Modern platforms are designed to protect communication between devices and management systems using strong encryption.
- Instant management: Revoke access, lock down a facility, and review entry logs in real time from a single dashboard—whether you’re onsite or remote.
Total Integration
Security is no longer a collection of silos. Your locks, your cameras, and your network should work together as a single, hardened unit.
By integrating access control with a cyber-centric approach, you help ensure your physical credentials are as thoughtfully managed as your digital accounts.
Next Step: Modernize Credentials Without Disrupting Operations
Ready to retire Prox and upgrade to encrypted credentials? Systems Integrations can assess your current access control, identify cloning and credential-management risks, and deliver a phased upgrade plan to encrypted smart cards and/or mobile credentials—without disrupting daily operations.
Contact us to schedule an Access Control Modernization Assessment.