New Technology Solves Security Issue
In Wireless Communications

Los Angeles – New technology that provides powerful security protection for wireless computer networks, cell phones and other radio communications has been developed by Robert Gold Comm Systems.

The company is headed by Dr. Robert Gold, an internationally known expert in coding algorithms and developer of the Gold Codes used in the Global Positioning System (GPS) network. Dr. Gold also oversaw signal design for NASA’s satellite-based tracking and data relay systems.

The new Gold Algorithm was developed under contract to the U.S. Air Force. It is designed to be integrated into the spread spectrum or frequency hopping systems widely used for wireless communications, such as “Wi-Fi” computer networks, cellular phones and two-way radios used by the military, police, firefighters, ambulances and commercial fleets.


Although very convenient for users, wireless communication is extremely vulnerable to eavesdropping. Wireless computer networks, for example, are frequently accessed by hackers or even innocent bypassers whose laptop computers link up with the network.

The security of these networks can be increased by encrypting the data, but encryption is complex, inconvenient and time-consuming for users, and adds a significant amount of overhead information that reduces data throughput.

In spread spectrum or frequency hopping networks now in wide use, data is protected by rapidly changing the frequency over which the transmission is sent, among the hundreds of frequencies over which the transmitter hops. The pattern of these changes, which can occur hundreds or thousands of times per second, must be known by a receiver in order for it to synchronize to the hopping pattern of the transmitter and establish communication. An intruder without knowledge of the synchronization pattern would not be able to intercept the communication, and may not even be aware communication is taking place.

However, spread spectrum networks have a major vulnerability. Information about this sync pattern must be sent to authorized receivers. Often sync information is based on an external clock or other information that must be communicated “in the clear,” or unprotected. If an intruder intercepts this information, the security of the network is compromised.


Robert Gold Comm Systems has developed a breakthrough self-synchronizing technique that provides secure messaging in wireless communications system. The patented technology, available for licensing, permits transmitters and receivers in a spread spectrum environment to rapidly and automatically synchronize their frequency hopping patterns without the need for external clocks or for “in the clear” transmission of the sync information.
Benefits of the Gold Algorithm include:

·     Highly secure communication without the overhead of encryption

·     Selective addressability of receivers, individually or in groups, so receivers on the network can instantly be included or excluded for specific messages

·     Highly efficient utilization of bandwidth

·     Immediate access (no dialup or connect delay)

·     Random access; receivers can enter the network at any time

·     Resistance to interference


The RGCS technology offers important competitive advantages to manufacturers of wireless local area computer networks (WLANs), including Wi-Fi installations and virtual private networks (VPNs); cell phones; military, police and civilian radio systems; satellite TV networks; voice over Internet protocol (VOIP) systems and other technologies that require secure, efficient use of broadcast spectrum.

The Gold Algorithm is designed to be incorporated into enhanced versions of existing products, many of which already include circuitry that can be adapted to implement the technology. (For this reason, RGCS has no plans to manufacture its own chips incorporating the algorithm.)


In a spread spectrum communications system, a transmission hops among numerous frequencies many times per second – for example, it might hop among 128 frequencies 1,024 times per second.

When using the RGCS technology, each receiver is set to monitor one of these 128 frequencies. As a receiver detects “hits” or bursts of data on its frequency, the Gold Algorithm uses the time intervals between the hits to derive sync information. The output of the algorithm is used to synchronize the hopping pattern of the receiver with that of the transmitter, so normal communication can take place.

The synchronization occurs automatically, without users having to enter passwords or take any action at all.

Because the Gold Algorithm processes the sync information very rapidly, the hopping pattern can be changed very often during the course of a transmission. As a result, brute-force attacks aimed at decoding the hopping pattern would be pointless, since the pattern would have been changed long before a decoding effort could be successful.

Communication to each receiver is enabled or blocked simply by switching on or off the transmission of signals on the frequency the receiver monitors. This enables users to create networks that are both secure and very flexible.

In a police department’s radio network, for example, a dispatcher could communicate privately with one patrol car without distracting other officers from their activities. At a crime scene, officers could instantly create an ad hoc network that would include those at the scene and selected supervisors at headquarters, and would exclude officers busy with other duties.

The Gold Algorithm supports CDMA (code-division multiple access), FMHA (frequency hopping multiple access) and UWB (ultra wide band) spread spectrum communication systems.


Potential applications of the Gold Algorithm include highly secure versions of wireless computer networks; cell phones; dispatch radio communications for police, ambulance and commercial purposes; military field radios; covert agent and downed pilot communications; “smart” broadcast and satellite delivery of video, audio and data with real-time authorization of receivers; control of remotely piloted vehicles and other devices, among other uses.
“This technology offers important advantages to manufacturers of a wide range of products, and important benefits to the users of those products,” said Dr. Gold.

“As a software-based solution, it provides manufacturers with very significant performance improvements and product differentiation without requiring major redesign of existing products. For the users of these products, benefits include always-on robust security, without the need for passwords or indeed any other intervention by the user.”


Robert Gold Comm Systems, Inc., was founded to develop and commercialize a self-synchronizing technology to provide security and increased functionality for spread spectrum communications. The company, located in Los Angeles, is headed by Dr. Robert Gold, who for more than 30 years has made major contributions to the theory, design, and analysis of coded communication systems, and is an internationally recognized authority in this field.

Dr. Gold’s achievements include code design for the Air Force Global Positioning System (GPS), the NASA Tracking and Data Relay Satellite System (TDRSS) and the Navy FLEETSATCOM. He has authored many classified and unclassified publications in the field of coded communications. He is perhaps best known for his invention of the “Gold Codes.”

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Note to editors:  Click here to view a Powerpoint presentation on the RGCS technology

Press contact:

Alexander Auerbach
Auerbach & Co., Inc.


Copyright © 2011 Robert Gold Comm Systems