Baseband Waveform Encryption for Wireless Security
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Solution Overview
Problem
Wireless communication systems face security vulnerabilities due to the potential for unauthorized interception and malicious use of data, especially with the increased computational power of devices enabling brute force attacks on traditional encryption methods.
Innovation Solution
Implementing baseband waveform encryption, which modifies the baseband signal representation of binary bits by using a time-varying baseband key to create a cipherbaseband signal, making it difficult for unauthorized parties to capture and decrypt the data without the appropriate key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional encryption methods are used, then data can be encrypted and decrypted, but increased computational power enables brute force attacks to overcome the encryption
Solution Approach 1:
The patent applies dynamics by transitioning from static traditional encryption to dynamic baseband waveform encryption. The encryption process modifies the baseband signal representation of binary bits using a time-varying baseband key, creating a cipherbaseband signal that changes continuously. This dynamic approach makes brute force attacks ineffective because the encryption parameters are not fixed but vary over time, preventing unauthorized parties from capturing and decrypting data without the appropriate time-synchronized key.
Solution Approach 2:
The patent implements parameter changes by altering the fundamental parameters of the signal representation at the baseband level. Instead of encrypting data at higher layers, the invention modifies amplitude, phase, or timing parameters of the baseband waveform itself. This changes the encryption domain from digital data space to analog signal space, making traditional decryption methods ineffective while maintaining reliable communication for authorized users with the correct key.
2Reliability
If baseband waveform encryption is implemented, then security is improved by making data unrecoverable without the correct key, but device complexity increases
Solution Approach 1:
The patent applies self-service by generating the baseband key waveform directly within the communication devices themselves rather than relying on external key management systems. Each device generates its own time-varying baseband key and uses it to encrypt and decrypt baseband signals. This self-contained approach enhances security while managing device complexity by integrating the encryption function into the existing baseband processing architecture rather than adding separate complex encryption hardware.
Data Source
AI summary
Communication devices and a method of providing secure electronic content are general described. Content is encrypted using a time-invariant encryption algorithm on the binary bits and a time-varying baseband key encryption waveform with a time-varying phase or amplitude. The content is recovered using a waveform with a reference phase mixed with a reference LO signal or combining the waveform and content using an XOR to measure a change of the phase/amplitude of the received signal relative to the LO signal. The key for the time-invariant binary bit level encryption may be communicated on a different channel than the content prior to communication of the content or concurrently with the content. The phase/amplitude of the baseband key may vary after baseband waveform encryption of a predetermined number of symbols, independent of the time, or after a predetermined time independent of an amount of baseband signal encrypted.