Breath Alcohol Calibration Transfer With Cryptographic Integrity
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Solution Overview
Problem
Existing breath alcohol ignition interlock devices (BAIIDs) require frequent recalibration, which involves shipping to and from calibration facilities, leading to inefficiencies and challenges in ensuring accurate and secure data handling and calibration.
Innovation Solution
A computerized calibration module with a cryptographic interface that securely transfers data from BAIIDs to a remote server, using cryptographic functions to ensure data integrity and accuracy, and incorporates a reference gas tank identification system to verify ethanol concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If BAIID devices are shipped to calibration facilities for recalibration, then calibration accuracy can be ensured, but loss of time and productivity are increased due to shipping and transit delays
Solution Approach 1:
A portable calibration system acts as an intermediary between the BAIID device and the calibration facility, enabling accurate calibration to be performed on-site without shipping the device. The portable system includes a reference gas source and calibration interface that can be brought to the calibration location, eliminating transit time while maintaining calibration accuracy through standardized reference gases and calibrated measurement procedures
Solution Approach 2:
The portable calibration system performs preliminary calibration actions on-site before the device would otherwise need to be shipped to a facility. By preparing and executing the calibration process at the location where the device is used, the system eliminates the need for subsequent shipping and waiting time, while ensuring accuracy through pre-calibrated reference standards
2Reliability
If BAIID devices are shipped to calibration facilities, then comprehensive calibration can be performed, but device availability and productivity are reduced during transit
Solution Approach 1:
The portable calibration system serves as a mobile intermediary that brings calibration capabilities directly to the BAIID device location. This eliminates the need to ship devices to centralized facilities, maintaining calibration reliability through standardized procedures and reference gases while keeping devices available for use throughout the calibration process
Solution Approach 2:
The calibration process is moved from a centralized facility dimension to a distributed on-site dimension. By deploying portable calibration equipment to various locations where BAIID devices are used, the system maintains calibration reliability through standardized reference standards while dramatically improving device availability by eliminating shipping and transit time
3Reliability
If data is transferred from BAIID devices to remote servers, then calibration data can be secured, but data security risks increase during transfer
Solution Approach 1:
Cryptographic hashing is performed preliminarily on the calibration data before it leaves the BAIID device. The hash value is calculated from the original data and transmitted along with the data to the remote server. This preliminary cryptographic action ensures that any tampering with the data during transfer can be detected by comparing the received hash with the recalculated hash of the received data
Solution Approach 2:
The system implements feedback through cryptographic verification where the remote server receives both the calibration data and its hash value, then verifies the integrity of the received data by comparing it against the transmitted hash. This feedback mechanism provides immediate detection of any data tampering during transfer, maintaining data security without requiring complex secure communication protocols
Data Source
AI summary
A breath alcohol device calibration system includes a computerized calibration module operable to calibrate a breath alcohol device, and an interface operable to couple the breath alcohol device to a remote server. The interface uses a connection employing a cryptographic function such that data stored on the breath alcohol device can be securely transferred from the breath alcohol device to the remote server using the calibration system. The interface is further operable to transfer data stored on the breath alcohol device from the breath alcohol device to the remote server directly without storing the data in nonvolatile storage on the calibration station.