多重證書在 ISO15118-20 標準下的處理

Abstract

近年來，隨著電動汽車（EV）的全球普及，電動汽車充電問題逐漸成為公眾關注的焦點。為了有效利用能源消耗並確保資訊傳輸的安全性，電動汽車與電動汽車供電設備（EVSE）必須在充電過程的前、中、後期交換特定資訊。這些資訊有助於電網的穩定性、不同充電方式的相容性、充電過程的安全性，並為電動汽車使用者提供更好的充電體驗。因此，許多充電通訊標準應運而生，如DIN 70121、CHAdeMO和ISO 15118。在本研究中，我們探討了ISO 15118如何通過合約證書在充電通訊過程中處理電動汽車的認證、資料安全及完整性驗證。在進行充電服務時，使用證書進行認證和授權是「即插即充」（Plug and Charge）的必要步驟。我們使電動汽車能夠將其證書發送給充電服務提供商，以驗證其身份。在之前的充電標準中，電動汽車通常只持有單一證書。然而，在ISO 15118-20中，引入了多證書功能，從而在不同場景或環境中提供了更大的靈活性。

In recent years, with the global proliferation of electric vehicles (EVs),the issue of EV charging has gradually become a focal point of public attention. To effectively utilize energy consumption and ensure the security of information transmission, EVs and electric vehicle supply equipment (EVSE) must exchange specific information before, during, and after the charging process. This information contributes to the sta bility of the power grid, the compatibility of different charging methods, the safety of the charging process, and provides a better charging experience for EV users. Consequently, numerous charging communication standards have emerged, such as DIN70121, CHAdeMO, and ISO 15118. In this work, We investigate how ISO15118-20 handles authentication and data security and integrity verification of electric vehicles (EVs) through contract certificates during the charging communication process. In con ducting charging services, using certificates for authentication and authorization is a necessary step for Plug and Charge. We enable the EV to send its certificate to the charging provider to verify the identity of the EV. In previous charging standards, an EV would only possess a single certificate. However, in ISO 15118-20, the functionality of multiple certificates is introduced, thereby providing greater flexibility in different scenarios or environments.