Is Your Security Footage Actually Secure? What Encryption Really Protects

Most businesses think about security camera protection in physical terms: a camera mounted out of reach, a locked equipment closet, a battery backup for the recorder. Fewer stop to ask a different question: what protects the footage itself once it's recorded?

That footage is some of the most sensitive data a business holds. It can include customer faces, employee movements, license plates, and glimpses of registers, safes, or back-office activity. If that video sits unprotected, a camera system meant to secure the business becomes, instead, one more thing that needs securing.

Two moments when footage is exposed

Video data is vulnerable at two points: while it's moving, and while it's sitting still.

In transit is the trip footage takes from the camera's sensor to wherever it's stored — a local NVR, a cloud server, or both. An unencrypted feed on that path can, in theory, be intercepted on the network it travels across.

At rest is everything that happens after the footage lands in storage, and it's the stage most businesses never think about. A recorder or hard drive that isn't encrypted protects footage from nobody who gets physical or network access to it — and NVRs do get stolen, and networks do get breached.

What encryption actually does

AES-256 encryption — the standard referenced throughout the banking and government security world — scrambles data using a 256-bit key, long enough that brute-forcing it isn't a realistic attack with current computing power. Encrypting footage both in transit and at rest means that even if a drive is removed or a connection is intercepted, the video inside is unreadable without the key.

It's a detail that rarely shows up in a product brochure's bullet points, but it's the difference between a camera system that only looks secure and one that actually is.

Where on-premise recording usually falls short

A standalone NVR sitting in a back office is a single point of failure. It's one device, in one location, that a break-in, a fire, a failed drive, or a ransomware attack can take out — footage, encryption or not, right along with it. Few on-premise systems encrypt at rest by default, and fewer still get patched often enough to stay ahead of known vulnerabilities.

What properly secured cloud storage looks like

This is the gap cloud video surveillance is built to close. Silarius Cloud encrypts footage with AES-256 both in transit and at rest, stores it on AWS-backed infrastructure with a 99.99% uptime SLA, and runs on infrastructure built to NDAA Section 889 compliance standards — the same bar required for government and many enterprise contracts.

It connects to the IP cameras a business already has over ONVIF or RTSP, so moving to encrypted cloud storage doesn't mean ripping out hardware, whatever brand of camera is already installed. Retention runs from a few days up to a year depending on the plan, footage is manageable across every site from one dashboard, and the platform scales from four cameras to several thousand.

Related reading

For more on how long encrypted footage should actually be kept, see our guide to video retention periods. For the compliance side of secure infrastructure, see our NDAA compliance guide.

A security camera system is only as trustworthy as the footage it produces. Before the next storage renewal or hardware refresh, it's worth asking not just "are we recording?" but "is what we're recording actually protected?"