Dynamic Security Mechanism for the Security and Efficiency of ATMS Data Transmission
Date Issued
2009
Date
2009
Author(s)
Chang, Yuan-Jui
Abstract
ITS aims at enhancing traffic safety, reducing congestion, increasing travel mobility, enlarging economic power and controlling efficient energy-use. Advanced Transportation Management System (ATMS) is the major sub-system of ITS, and it utilizes monitor apparatus, communications and other control technologies to obtain or exchange traffic information between the traffic devices. However, during the data transmission, the situation of the data packets switching is exposed and not protected. Someone can use existing software to intercept the data packets from transmission process easily and these attacks will cause ATMS to become paralysed and disorder the signal timing or impaired traffic safety seriously. Therefore, the traffic data transmission security should be the principal issue for ATMS nowadays, but less people concern with the issue.y these reasons, this study concentrates on the information security of ATMS data transmission through modern cryptography and sets up a suitable security mechanism which aims at the message packet exchange and transmission via Java programming language. In which, the cryptography techniques would be adopted to protect the contents of data packet from masquerading, replying and tampering; and the general encryption algorithm is used to transform the plaintext into the ciphertext via the secret keys. n the past, the secret key algorithms during the encryption/decryption procedures are invariable and regular; furthermore, and the message packets are transmitted frequently in traffic control. In these conditions, one could crack the secret key algorithms easily by the frequent transmission. Thus, this research designs and implements an encryption technique which the secret keys could be changeable for each message and suitable for the ATMS data transmission; we called it dynamic encryption technique.n the other hand, we expect the security mechanism would not only achieve the data security but also consume less resources of the core system. Unfortunately, in the process of improving the data security, it also brings some negative-effects on the core system. Therefore, the system operation efficiency is also the major consideration of the security mechanism design. In additional, the security mechanism could be suitable for the existing communications media which transportation filed commonly uses nowadays, namely: wired network communications and 3.5G mobile communications.
Subjects
ITS
ATMS
Cryptography
Security
Efficiency
Encryption
Type
thesis
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