ATMS通訊安全動態加密技術研究
Dynamic Encryption Technique for the Security of ATMS Data Transmission
Resource
運輸學刊, 22(1), 51-74
Journal
運輸學刊
Journal Volume
22
Journal Issue
1
Pages
51-74
Date Issued
2010-03
Date
2010-03
Author(s)
Chang, Tang-Hsien
Yu, Shang-Min
Liu, Yi-Chieh
Chang,Yuan-Jui
Abstract
Advanced Transportation Management Systems (ATMS) is the major sub-system of ITS. The NTCIP (National Transportation Communications for ITS Protocol) which incorporates ISO-OSI structure and can be compatible with Internet protocols has been followed by many countries. Although security issue arose from its open environment, more often than not, this was ignored by traffic engineers practically. Therefore, this paper aims at designing a suitable and securer system combining symmetric cryptography with asymmetric cryptography as a hybrid cryptosystem to ensure the transmission security of ATMS data, especially in terms of their authentication, confidentiality and integrity. In addition, a dynamic encryption technique is utilized to improve security level without increasing the length of encryption key. In order to recognize the effects resulting from encryption and decryption of transmission data, three experiments are designed and executed within this system. Statistical analysis is also applied to test and verify the influence induced by this extra secure mechanism comparing to the no encryption situation. Finally, reliability analysis based on experimental data is brought out in this study. Thereupon ATMS operators can select proper threshold for transmission time according to the requirement of reliability. The hybrid cryptosystem applied in this research provides ATMS with both securer and more efficient way for data transmission, and avoids waste of communication resources.
Subjects
ATMS,Cryptography,Security,Efficiency
Type
journal article
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