Wireless Covert Channel Packet Structure for Low-Load Transmission
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Solution Overview
Problem
Wireless covert channels face limitations in increasing signal strength due to system load and are affected by poor communication conditions, particularly for heat and magnetic field-based channels, which restrict frequent information delivery.
Innovation Solution
The proposed solution involves reducing the intensity and frequency of covert channel signals, using a packet structure with a Start Frame Delimiter (SFD) field, payload attribute field, and payload bit inversion field to minimize system load and facilitate signal identification even in poor communication conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal strength of covert channel is increased to improve information delivery reliability, then communication reliability is improved, but system load increases causing harmful effects
Solution Approach 1:
The patent changes the parameter of signal intensity by transmitting covert channel signals at low intensity levels rather than high intensity levels. This allows the system to maintain communication reliability through alternative means (such as multiple transmissions and error correction) while avoiding the harmful effect of excessive system load that would occur with high intensity signals.
Solution Approach 2:
The patent employs periodic transmission of covert channel signals multiple times to ensure reliable delivery. By transmitting the same signal repeatedly at low intensity levels, the system achieves the reliability of high intensity transmission without the harmful system load increase, as each individual transmission uses minimal system resources.
2Productivity
If frequency of covert channel signal generation is increased to improve information delivery speed, then productivity is improved, but system load increases causing harmful effects
Solution Approach 1:
The patent changes the parameter of signal intensity to low levels, which allows for more frequent transmissions without proportionally increasing system load. The low intensity transmissions can be performed more frequently since each individual transmission consumes fewer system resources, thereby improving productivity while controlling harmful system load effects.
Solution Approach 2:
The patent uses periodic transmission at low intensity levels multiple times to achieve fast information delivery. By repeating the low intensity transmission process, the system can deliver information quickly through multiple attempts while maintaining low system load per transmission, thus improving productivity without the harmful effects of high load single transmissions.
3Object-generated harmful factors
If intensity of covert channel signal is reduced to minimize system load, then harmful effects are reduced, but ease of signal identification deteriorates
Solution Approach 1:
The patent compensates for reduced signal identification ease by transmitting the low intensity signals multiple times in a periodic manner. This repetition creates a pattern that can be easily identified by the receiver, overcoming the difficulty of identifying individual low intensity signals. The periodic structure provides clear temporal markers that facilitate signal detection despite low intensity.
Solution Approach 2:
The patent incorporates feedback mechanisms where the receiver acknowledges received signals and the transmitter adjusts subsequent transmissions accordingly. This feedback loop ensures that even low intensity signals are reliably identified and processed, as the receiver can confirm successful detection and the transmitter can optimize transmission timing and patterns to maintain ease of identification.
4Object-generated harmful factors
If frequency of covert channel signal generation is reduced to minimize system load, then harmful effects are reduced, but productivity deteriorates
Solution Approach 1:
The patent changes the intensity parameter to low levels, enabling more frequent transmissions without increasing system load. This parameter change allows the system to maintain high productivity through frequent low-intensity transmissions rather than infrequent high-intensity transmissions, thus avoiding the deterioration of productivity that would result from reducing transmission frequency.
Solution Approach 2:
The patent uses periodic transmission at low intensity levels to maintain high productivity. By repeating transmissions periodically at low intensity, the system achieves fast information delivery through multiple attempts while keeping system load low. This periodic low-intensity transmission strategy prevents productivity deterioration compared to reducing transmission frequency.
Data Source
AI summary
Disclosed herein is an apparatus and method for transmitting/receiving information using a wireless covert channel. The apparatus for transmitting information using a wireless covert channel includes memory in which at least one program is recorded and a processor for executing the program. The program generates a packet from each of data blocks having a predetermined size acquired by dividing data and transmits the packet through a covert channel, the packet is configured with a header and a payload, and the header may include a Start Frame Delimiter (SFD) field indicating the start point of the packet, a payload attribute field indicating whether the payload is data or a Cyclic Redundancy Check (CRC), and a payload bit inversion field indicating whether the value of the payload is inverted in units of bits.