Encrypted LIDAR Systems Using Pseudorandom Key Sequences
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Solution Overview
Problem
Traditional LIDAR systems lack encryption schemes, making them vulnerable to interference and malicious spoofing attempts, which can lead to incorrect object detection and distance measurement.
Innovation Solution
The implementation of a cryptographically secure deterministic random bit generator to generate a secure pseudorandom key sequence, which is encoded into the emitted light pulses of the LIDAR system, providing secure encryption and authentication of reflected light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional LIDAR systems are used without encryption schemes, then the system structure remains simple and easy to manufacture, but the system becomes vulnerable to interference from other LIDAR systems and malicious spoofing attempts
Solution Approach 1:
The patent applies preliminary action by generating and encoding a pseudorandom key sequence into the emitted light pulses before transmission. This pre-encoding of cryptographic information into the optical signal allows the system to authenticate reflected light and reject spoofing attempts before they can compromise the distance measurement, thus improving security without requiring complex post-processing authentication mechanisms
Solution Approach 2:
The patent uses an intermediary approach by introducing a pseudorandom key sequence as a mediator between the transmitted light and the received signal. This key sequence is encoded into the emitted light pulses and serves as an authentication layer that enables the receiver to distinguish genuine reflected signals from spoofing attempts, thereby enhancing reliability while maintaining relatively simple system architecture
2Reliability
If encryption schemes are implemented in LIDAR systems, then vulnerability to interference and spoofing is reduced, but the device complexity increases
Solution Approach 1:
The patent applies mechanics substitution by replacing complex cryptographic hardware systems with a software-based pseudorandom key generation and encoding approach. Instead of using dedicated cryptographic devices or complex authentication hardware, the system uses computational algorithms to generate pseudorandom sequences and encode them into light pulses, achieving strong authentication with simpler overall system architecture
Solution Approach 2:
The patent uses parameter changes by modulating the light signal with encoded pseudorandom key sequences. By varying the optical parameters (such as intensity, phase, or timing) according to the pseudorandom key, the system embeds cryptographic information into the light pulses themselves, enabling authentication functionality without adding separate complex cryptographic hardware layers
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively mitigates vulnerabilities to interference and malicious attacks by ensuring only authenticated light is used for distance calculations, enhancing the accuracy and security of LIDAR systems in autonomous vehicles.
Implementation Method 1
measure distances to detected objects
Implementation Method 2
reflected light
Implementation Method 3
encoded into the emitted light pulses
Data Source
AI summary
Described are systems and methods for providing an encrypted LIDAR system, which may be used in autonomous vehicles. Embodiments of the present disclosure can provide LIDAR systems and methods employing a cryptographically secure deterministic random bit generator (DRBG) to generate a secure pseudorandom key sequence. The secure pseudorandom key sequence can be encoded into light pulses emitted by the exemplary systems and methods. Subsequently, upon receipt of reflected light, the exemplary systems and methods can authenticate the received reflected light to confirm the key sequence encoded in the received reflected light. If the key sequence encoded in the received reflected light matches the key sequence encoded into the emitted light pulse, parameters associated with the emitted and reflected light can be used to determine a distance to the object that may have reflected the emitted light pulse. In the event the received reflected light does not include the encoded key sequence the received light can be “discarded” by the exemplary systems and methods.