US Patent 10498538 Time-bound secure access

Described herein is a system and universal access control device that may enable a user device to gain access to a secure area or resource during a particular time duration. In some embodiments, a user device may relay a received access token to the universal access device via a wireless transmission at a particular time. The universal access device may verify the authenticity of the access token by relaying the access token information to the remote server, which may authenticate the user device and verify that the user device is permitted access at the particular time. Upon authentication and verification, the user may gain entry to the secure area.