An access control system and associated devices are described that conceal and securitize data transmissions between one or more secure databases for various user devices to ensure proper entrance or access into secure locations by approved personnel only. Specific methods and devices for securing (primarily digital and normally two-way) communications using applications that combine securing communications for wireless/cellular phones with personnel access card readers for entry into secure locations are also described. These combined communication and access devices require using specific encryption techniques that cannot be corrupted and are essential to denying fraudulent or otherwise unauthorized personnel the ability to enter or access security protected devices or locations.