LPWA Transmitter Key Stream Generation for Confidentiality
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Solution Overview
Problem
Low Power Wide Area (LPWA) communication systems face challenges in maintaining confidentiality and communication resistance due to increased power consumption when using encryption methods that require complex arithmetic processing, and they struggle to effectively counter replay attacks and tampering, especially when using waveform synthesis techniques.
Innovation Solution
The implementation of a transmitting device and receiving device that generate a key stream using timing information as an initial value, encrypt data using this key stream, and modulate the encrypted data into a waveform signal, with the receiving device inverting the polarity of the waveform signal to decode the data, thereby enhancing security against replay and tampering attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption methods using complex arithmetic processing are used to improve security, then confidentiality and communication resistance are improved, but power consumption increases in IoT terminals
Solution Approach 1:
The patent changes the parameter of encryption from complex arithmetic processing to simple XOR operations with a key stream generated by a linear feedback shift register (LFSR). This parameter change maintains security through the use of a pseudo-random key stream while dramatically reducing computational complexity and power consumption in the IoT terminal.
2Reliability
If waveform synthesis methods are used to improve demodulation ability, then communication resistance is improved, but vulnerability to replay attacks increases
Solution Approach 1:
The patent applies preliminary action by generating a unique key stream for each transmission using timing information as a seed. This preliminary generation of distinct encryption keys for each transmission prevents replay attacks while maintaining the benefits of waveform synthesis for demodulation, as each transmitted waveform is encrypted with a different key stream.
Data Source
AI summary
The present disclosure relates to a transmitting device and a transmitting method, and a receiving device and a receiving method which are capable of improving confidentiality and communication resistance in low power wide area (LPWA) communication.The transmitting device generates a key stream on the basis of GPS time information, encrypts transmitted data on the basis of the key stream to generate encrypted data, and transmits the encrypted data to the receiving device. The receiving device generates a key stream on the basis of GPS time information and decodes the encrypted data into the transmitted data on the basis of the key stream. The present disclosure can be applied to an LPWA communication system.