US Patent 6983888 Portable wireless anti-theft USB disc

The invention relates to a portable wireless anti-theft flash memory having a body proper in which there are a flash memory, a high frequency receiver circuit, and a monode switch to go with a cap, in which are a high frequency transmitter, an encoding circuit, and a counter, for casing the body proper. Connecting the body proper to a computing device enables high frequency transmitting, receiving, and turning on flash memory firewall. When the transmitting source is a distance away, the firewall becomes engaged thus disabling the flash memory to prevent loss of data from theft for safety purpose.