Maximizing the Power of Card Access Systems

I talk a lot about layers of security, and one of the most effective tools in a security program is card access control. But how does it actually work, and what can you do to make the most of it?

How Card Access Works—The Basics

Every credential—whether it’s a card, fob, or mobile phone—carries a unique identifier. When you tap it on a reader, the access control board checks a database to determine whether access should be granted based on:

• Who you are (Your credential’s ID)

• Where you’re going (Which door you’re trying to access)

• When you’re going (If access is allowed at that time)

If approved, the system triggers the device (lock, gate arm, turnstile, etc), and access is granted. If not, the attempt is logged—ensuring security and accountability.

Beyond Basic Access: Features That Strengthen Security

Modern card access systems do more than just unlock doors. The best setups can also include:

• Anti-Passback – Prevents credential sharing by requiring users to badge out before re-entering. Ideal for employee tracking and secured areas.

• Dual Credential Access – Requires both a card + PIN (or another authentication factor), reducing risk if a card is lost or stolen.

• Dual Custody – Needs two authorized users to badge in before access is granted, useful for high-security areas.

• Door Position Sensors – Alert security if a door is propped open or forced.

• Time-Based Access & Schedules – Doors can be set to only unlock during working hours or require a staff member to present a card before a schedule kicks in.

The Power of Integration: Card Access & Surveillance

One of the biggest game-changers in physical security is linking access control with CCTV cameras. Why?

• When a credential is used, the camera footage automatically tags the event, so security teams can see exactly who entered and when.

• If an unauthorized attempt happens, video verification allows for a faster response.

• Integrated systems allow guard stations to monitor real-time access attempts, improving security oversight.

Challenges & Adoption: Why Some People Resist Access Control

Despite the security benefits, not everyone loves card access at first. The biggest sources of pushback?

• Tenants in multi-residential buildings often feel like they're being monitored—this "big brother" concern is common.

• Mid-level staff with old key-based accessresist change because they’re used to carrying master keys and having unrestricted movement.

• Propped doors & bypass attempts – Some people tape latches or leave doors open to avoid using credentials, undermining security.

The fix? Education.

• Security starts with buy-in from credential holders.

• Training sessions on why access control matters and how it protects people and property help increase compliance.

• When transitioning to card access, consider rekeying the facility to eliminate any unaccounted-for master keys.

Final Thought: Card Access is Just One Layer

While card access is a powerful security tool, it’s not a magic bullet. A strong security program also includes CCTV, alarms, monitoring, and a responsive security culture. The best systems are only as good as the people using them—so make sure yours is set up for success.

Want to learn more about how card access can enhance your security? My teams and I are here to help.