Secure, networked portable storage device

A portable data storage device comprising:

• a secure data storage section;
• a program storage section comprising a security program operatively connected to the secure data storage section, wherein the security program is operable to selectively enable and disable access to the secure data storage section;
• a device antenna operable at a low frequency not exceeding one megahertz;
• a transceiver operatively connected to the device antenna, the transceiver operable to receive radio signals at the low radio frequency and generate data signals at the said low radio frequency, in response thereto;
• a programmable microprocessor operatively coupled with the transceiver and the program storage section, the microprocessor configured for controlling operation of the program storage section and to cause the transceiver to emit an identification signal;
• a connector for enabling an electrical connection between the portable device and another device, wherein the connector and the secure data storage section are not operatively connected;
• and
• a heat-generating device for causing erasure of data in the data storage section and wherein the microprocessor is further configured for actuating the heat-generating device in response to receiving an erase signal.