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Thule Subterra is built with durable materials and a protective hard-shell back panel that absorbs the impact of travel. Referring now in specific detail to the drawings, and particularly FIG. 2, there is illustrated an exemplary portable device 200 according to an embodiment of the present invention. There are many reasons why a user of the portable device or an administrator in an office where the portable device is used may need to have a certain region of the device protected from unauthorized access. ­­If you know you have to finance the car, you need to shop around for the best interest rate. These LF tags function well in harsh environments, near water and steel, and may have full two-way digital communications protocol, digital static memory and optional processing ability, sensors with memory, and ranges of up to 100 feet. Radio tags communicate via magnetic (inductive communication) or electric radio communication to a base station or reader, or to another radio tag.

One tag is operable to send and receive radio signals from another tag within the network or to a reader. This custom transceiver 270 is designed to communicate (transmit and receive radio signals) through the omni-directional loop antenna 260. All communications take place at very low frequencies (e.g. under 300 kHz). A transceiver is a radiating radio tag that actively receives digital data and actively transmits data by providing power to an antenna. Thus, cherokee workwear scrubs the receiver 270 may be on at all times and hundreds of thousands of communication transactions can take place, while maintaining a life of many years (up to 15 years) for the battery 210. The range of the transceiver 270 can be augmented by the use of field antennas. RuBee™ transceiver 270. The transceiver 270 is operatively connected to the antenna 260 and the microcontroller 280. It may be created on a custom integrated circuit using four micron CMOS (complementary metal-oxide semiconductor) technology. The energy source 210 may be a battery (e.g., battery, solar cell, induction coil/rectifier) operable to energize the transceiver 270 and the microcontroller 280. The battery 210 shown in FIG. 2 is preferably a lithium (Li) CR2525 battery approximately the size of an American quarter-dollar with a five to fifteen year life and up to three million read/writes.

A microprocessor or microcontroller 280 controls the operation of the security program 290, controlling the entire operation of the secure data section 250 based on the security program stored in the program storage. The identification code may be hardwired into the storage element 295 or the security program 290 or it may be programmatically inserted as software by the microcontroller 280 after receiving the code signal from a trusted source. The microprocessor 280 may be a standard original equipment manufacture (OEM) microprocessor. The standard, IEEE P1902.1™, "RuBee Standard for Long Wavelength Network Protocol", allows for networks encompassing thousands of radio tags operating below 450 KHz. According to an embodiment of the present invention, a portable device is configured using the RuBee IEEE P1902.1 "RuBee Standard for Long Wavelength Network Protocol" to safeguard data located within a protected area of the portable device. As opposed to the inductive mode radiation above, the electromagnetic mode uses frequencies above 3000 kHz in the Hectometric range, typically 8-900 MHz, where the majority of the radiated energy generated or detected may come from the electric field, and a ¼ or 1/10 wavelength antenna or design is often possible and utilized.

The majority of radiated and detected energy is an electric field. Since the wavelength is so long at these low frequencies, over 99% of the radiated energy is magnetic, as opposed to a radiated electric field. To understand how the security features are enabled, we discuss the RuBee™ long wavelength network protocol. RuBee™ is a bidirectional, on-demand, peer-to-peer transceiver protocol operating at wavelengths below 450 Khz (low frequency). A UFI driver is a protocol adopted for use by USB storage devices. The device as will be described herein can be configured as part of a network and can be operable to receive and transmit signals to/from other portable devices within the network. The method for securing a portable device as will be described herein enables the protection/tracking/control of portable devices within a secured network, using low frequencies. A secured network is any building, classified site or other region wherein the portable devices may be securely used.