TECHNOLOGIES FOR ACCESS CONTROL COMMUNICATIONS

A method according to one embodiment includes receiving, by a gateway device and from an access control device, credential data received by the access control device from a mobile device in response to presentation of the mobile device to the access control device, comparing the credential data to a gateway credential list stored in a memory of the gateway device, the gateway credential list identifying a plurality of credentials associated with the gateway device, and each credential of the plurality of credentials associated with a unique credential index, transmitting, to a server, the unique credential index associated with the credential data in response to determining that the credential data matches a corresponding credential in the gateway credential list, and receiving, from the server, an access control decision associated with the credential data in response to transmitting the unique credential index.