Abstract: A computer implemented method and apparatus for controlling the accessibility of data on a data storage 9 comprises obtaining an identifier, and determining dependent on the identifier, in a secure context 5 of a computer processor 1, whether to make data accessible in a user context 3. In the event that data is to be made accessible, access is provided to the data in the user context 3.

Abstract: A communication and security device for a portable computer having an interface for connecting the security device to a host device to enable the security device to control encryption and decryption of data communication between a processor of the host device and a data storage of the host device. Examples include a security device with data storage for storing an encryption key for the encryption and decryption of the data communication, a security processor coupled to the interface and to the data storage for controlling the data communication by use of the encryption key, and a wide area communication interface configured for secure communication with a remote device. The security processor may be configured to control the data communication between the processor of the host device and the data storage of the host device based on the secure communication.

Abstract: A communication and security device for a portable computer having an interface for connecting the security device to a host device to enable the security device to control encryption and decryption of data communication between a processor of the host device and a data storage of the host device. Examples include a security device with data storage for storing an encryption key for the encryption and decryption of the data communication, a security processor coupled to the interface and to the data storage for controlling the data communication by use of the encryption key, and a wide area communication interface configured for secure communication with a remote device. The security processor may be configured to control the data communication between the processor of the host device and the data storage of the host device based on the secure communication.

Abstract: A communication and security device for a portable computer is disclosed including a housing, a connector provided on the housing for physical connection to the portable computer, a computer interface coupled to the connector for communicating data with the portable computer, a wireless modem coupled to the computer interface for communicating data between the portable computer and a remote device via a wireless network, a controller configured to control access to the data storage based on an identifier in a security message received via the wireless network.

Abstract: A communication and security device for a portable computer is disclosed including a housing, a connector provided on the housing for physical connection to the portable computer, a computer interface coupled to the connector for communicating data with the portable computer, a wireless modem coupled to the computer interface for communicating data between the portable computer and a remote device via a wireless network, a regulator operable to regulate power in the communication and storage device, and a processor coupled to control the regulator, the processor coupled to the wireless modem and arranged to process at least one security command received by the wireless modem to control the regulator in response to the received command.