[1]WANG Qi,ZHANG Jiazheng,LIU Wenqi.Design and implementation of a public security law enforcement electronic evidence system based on blockchain technology[J].CAAI Transactions on Intelligent Systems,2022,17(6):1182-1193.[doi:10.11992/tis.202112034]
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Design and implementation of a public security law enforcement electronic evidence system based on blockchain technology

CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume: 17 Number of periods: 2022 6 Page number: 1182-1193 Column: 学术论文—智能系统 Public date: 2022-11-05
Title:
Design and implementation of a public security law enforcement electronic evidence system based on blockchain technology
Author(s):
WANG Qi1;  ZHANG Jiazheng2;  LIU Wenqi1
1. Center of Data Science, Kunming University of Science and Technology, Kunming 650500, China;
2. Yunnan Provincial Key Laboratory of Computer Technology Application, Kunming University of Science and Technology, Kunming 650504, China
Keywords:
blockchain; electronic evidence; distributed storage; PBFT consensus algorithm; database; heterogeneous consensus; data difference; police law enforcement
CLC:
TP391
DOI:
10.11992/tis.202112034
Abstract:
We developed a prototype system for law enforcement electronic evidence data based on blockchain technology, focusing on the complexity of the law enforcement environment, the difficulties of electronic evidence collection and evidence fixation, and the functional requirements of electronic evidence in the scene of public security law enforcement. The system is distributed, non-tamperable, and traceable with a high level of security. It addresses the fundamental issues of variability, logic confusion, and time inconsistency in law enforcement electronic evidence collection and litigation for police. The system uploads the data involved in the law enforcement process to the chain, monitors the behavior of those attempting to tamper with the law enforcement data by improving the practical byzantine fault tolerance consensus algorithm, and uses the hierarchical supervision feature to activate the standby consensus node to improve overall efficiency. Based on the interplanetary file system, large files are uploaded to the chain and stored, which allows the public security system to process large-scale data in a timely, safe, and efficient manner. The feasibility of our system is validated by the test and analysis of the law enforcement scene in the case-handling hall of the public security bureau. The use of this system has the potential to improve the performance of law enforcement and anti-corruption efforts in the judicial field and provide a credible data foundation for the intelligentization of serial and parallel case detection.
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