Abstract: An electronic device and method for tailgating detection is provided. The electronic device receives data from an access control system for a physical entry point. When an event that indicates an access grant is detected, entry information for a period is collected. The information includes a set of authentications provided by the access control system. The electronic device receives a video from at least one imaging device, extracts object detection information from the video, and determines cost information based on a comparison of a time of each entry and a time of each authentication. Thereafter, the electronic device determines a correspondence between a subset of the entries and the authentications based on the cost information. The electronic device detects, from entries included in the object detection information, one or more entries that are different from the subset as tailgating entries. An output device renders tailgating information based on such entries.