VOCAL’s Frequency Scrambler provides a basic level of assurance for radio, mobile and VoIP communications used by commercial, police, public safety and other organizations.
- Frequency inversion using random or fixed frequencies
- Supports frequency hopping or rolling
- Split band scrambling available
- Transmitted audio is unintelligible
- Optimized for DSP, ARM and other processors
VOCAL’s Frequency Scrambler discourages interception and use of transmitted communications by casual listeners, competitors or other unauthorized eavesdroppers. Frequency scrambling can also be used over a voice encoded channel such as GSM to further obfuscate ongoing conversations. Listening to this inverted signal as it is transmitted would be unintelligible.
Our Frequency Scrambler is available for licensing as a standalone algorithm or as part of a more comprehensive library. Our source code is optimized for microprocessors and DSPs from TI, ADI, Intel, ARM and other vendors. With over 25 years of custom design and development experience in the telecommunications industry, contact us to discuss your secure communications application requirements.
Frequency Inversion
The Frequency Scrambler software uses a frequency value to invert the frequency of the input signal and provide a mirror image at a different frequency range. In a similar manner, inverted signals can be descrambled using the same frequency offset.
Frequency inversion can be performed using a single frequency value over the entire communication session. For greater protection, inversion can use different frequencies that change periodically during the communication. This allows for the implementation of a frequency hopping or rolling system using randomly generated frequencies or values selected from a predefined sequence of frequencies. Split band scrambling is also available for an additional level of communications assurance.
Platforms
VOCAL’s software is available for the following platforms. Please contact us for specific Frequency Scrambler supported platforms.
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