Page 220 - 捷運技術 第38期

214 徐春進 史敦仁 捷運系統票證加密與通訊安全

捷運系統票證加密與通訊安全

1
2
徐春進 史敦仁
摘要

台北捷運票證系統隨路網之持續發展，及悠遊卡之普遍推廣至其它交通運輸服務業，原
本封閉之票證系統逐漸面臨類似網際網路之安全顧慮。為確保票證系統之正確交易與資料傳
輸之安全性，如何在票證交易認證與交易資料傳遞上予以嚴謹規劃防止非法侵入，為日後系
統規劃設計之主要課題。

關鍵詞：金鑰、訊息確認碼、摘要演算、加密演算

Data Encryption and Communication Safety on the Taipei MRT AFC System
1
Chuen-Jin Shiu Tun-Jen Shih 2

Abstract

With the expansion of the Taipei MRT network and EasyCard's popular use in other
transportation fields, the originally closed Automatic Fare Collection (AFC) system is gradually
facing safety concerns like those the internet has faced. Ensuring the system's transaction
correctness and data transmission safety has become a major study topic for future system design.

Major sub-topics include how to authenticate transactions and prevent illegal incursion into data
transmissions.
Keywords: key, message authentication code, digest algorism, encryption algorism

1. 臺北市政府捷運工程局機電系統工程處幫工程司 cjxu@trts.dorts.gov.tw
2. 臺北市政府捷運工程局機電系統工程處工務所主任 tjshih@trts.dorts.gov.tw