Applications / Security
Tailgating & Credential Sharing Detection
Detects a second person following an authorised badge-holder through a door, gate or turnstile, and correlates every access-control event with what the camera actually saw.
See it in action
One badge, two people — correlated against the access event
Video slot — awaiting upload.
What it detects
Access control records a credential. The camera records a person. Fogsphere compares the two and surfaces the cases where they do not agree.
Door and turnstile tailgating
Identifies a second person passing through on a single badge presentation, at controlled doors, turnstiles and speed gates.
Vehicle tailgating at gates
Flags a second vehicle following through a gate on one authorisation, alongside the plate read for the authorised vehicle.
Badge-event and video mismatch
Correlates each access-control event with the camera view and surfaces the events where headcount, direction or timing do not match the credential used.
Door held open and door left open
Detects doors propped, held or left open beyond the configured interval, including the sequence where a badge is used and the door never closes.
Gangway and personnel-transfer boarding
Counts personnel through gangways, helidecks and transfer points, and flags boarding events without a matching authorisation.
Badge-zone breach
Identifies people inside a badge-controlled zone with no corresponding entry event for that zone.
Headcount against the authorised list
Compares people counted in a controlled area against the expected on-site or on-shift list, and surfaces the difference.
Visitor and contractor escort compliance
Flags visitors and contractors moving through controlled areas without the escort their access class requires.
Credential-sharing patterns
Surfaces the same credential appearing at locations or times that a single person could not have covered, and repeated anomalies against the same badge.
Out-of-hours access anomalies
Correlates access events outside normal working hours with the camera record, so unusual entries are reviewed rather than buried in the log.
Where it applies
Tailgating is named in the security sections of the chemical, healthcare, logistics, manufacturing, oil & gas, power-generation and construction papers, usually alongside badge-zone and after-hours monitoring.
How it works
Edge inference on the cameras you already have
Detection runs at the door, gate or turnstile on the camera already covering it. People-counting and direction inference happen on the edge device, so no continuous video needs to leave the access-controlled area.
Zones, thresholds and schedules you configure
Set the expected headcount per credential, the door-open interval, the escort rule and the active hours per portal. Turnstile lanes, loading-bay doors and ward entrances can each carry different thresholds.
Every event carries its own evidence
Each detection is logged with a timestamp, the camera and zone it came from, and a short clip. The record can be reviewed, exported or attached to an investigation without trawling through hours of footage.
Feeds the systems already in place
Events surface in Fogsphere Manager and route outward to the VMS, access-control platform, control-room wallboard, ticketing queue or messaging channel operators already watch.
Risk & control objective
The control objective is knowing that the people inside a controlled zone are the people authorised to be there. Access control answers who presented a credential; it cannot answer how many people walked through, or whether the badge and the body match.
That gap is where insider risk and contractor-management problems surface. A propped door, a shared badge, an unescorted visitor and a following vehicle are all ordinary-looking events that leave no trace in the access log. Fogsphere gives them a record: the access event, the camera view, the count, and the discrepancy between them.
Correlation also reduces investigation cost. When a zone breach is queried weeks later, the badge log alone rarely settles it. An access event with its matching clip, headcount and timestamp does.
Related solutions
Put a camera record behind every access event
We will show you what tailgating and badge-mismatch detection looks like on your own doors, gates and turnstiles.