Abstract: We are presenting a system to keep your data prevented against unauthorized access by using symmetric key. In order to keep this symmetric key secret the proposed system encrypts this confidential symmetric key with the public cryptographic function and the key stored into the window’s registry. This system also uses the Bluetooth technology as the main technique for communication between elements of the system. The use of Bluetooth device’s MAC address which is stored in the registry of our personal computer plays a major role in securing the data. The system focuses on to ensure data confidentiality to the authorized users only.

Keywords: Bluetooth communication, Rijndael algorithm, MAC addresses, Windows Registry.