Abstract: In a personal Internet communication device, a security key is stored on the master boot record. Any bootable device attempting to write operating system files or software files must have an authorized signature key in order to be eligible to install files on the personal Internet communication device.

Abstract: An improved compression and decompression technique to maximize the utilization of low capacity data storage while minimizing the decompression time. In one embodiment, software files comprising a file header and a plurality of records are compressed to generate a compressed file header and a single record that contains a compressed image of the original plurality of records. Upon execution, the record is decompressed and portions of the compressed images corresponding to destination addresses are decompressed to allow a decompressor to directly place the decompressed records in the desired destination. In another embodiment of the invention, software files comprising a file header and a plurality of records are individually compressed to generate a compressed file header and a plurality of compressed records.

Abstract: In a personal Internet communication device, a security key is stored on the master boot record. Any bootable device attempting to write operating system files or software files must have an authorized signature key in order to be eligible to install files on the personal Internet communication device.

Abstract: An electronic article surveillance system includes a signal generator for generating an interrogation signal in an interrogation zone, an antenna which receives a signal present in the interrogation zone, and interference cancelling circuitry for cancelling interference components in the signal received by the antenna. The interference cancelling circuitry includes a hybrid interference component cancelling loop in which a digital interference estimate signal is formed and converted into an analog estimate signal, and the analog estimate signal is subtracted from an input analog signal. The resulting difference signal is processed with a hybrid automatic gain control loop. A digitized signal, formed from the resulting difference signal, is subjected to digital interference cancellation processes in addition to the hybrid interference component cancellation process.