ELECTRONIC DEVICE FOR VEHICLE

To provide a technology for making compatible both resistance against data falsification, and quick data write-in at the occurrence of a specific event.SOLUTION: An access control part for controlling access to a memory by a CPU is arranged at an electronic control device which is mounted to a vehic...

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Bibliographische Detailangaben
1. Verfasser: UEMATSU NOBUYA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a technology for making compatible both resistance against data falsification, and quick data write-in at the occurrence of a specific event.SOLUTION: An access control part for controlling access to a memory by a CPU is arranged at an electronic control device which is mounted to a vehicle. When it is determined that a vehicle collision is not detected in S110 when the access control part is imparted with a write-in requirement from the CPU, the access control part performs authentication processing in S120 to S140, and when the authentication is successful by the authentication processing, the access control part writes data into the memory in S 150. Also, when it is determined that the vehicle collision is detected in S110, the access control part writes the data into the memory in S150 without performing the authentication processing.SELECTED DRAWING: Figure 3 【課題】データ改ざんに対する耐性と、特定の事象が発生した際の迅速なデータ書き込みとを、両立させる技術を提供する。【解決手段】車両に搭載される電子制御装置には、CPUによるメモリへのアクセスを制御するアクセス制御部が備えられる。アクセス制御部は、CPUから書き込み要求が与えられた際に、S110にて、車両衝突が検出されていないと判定した場合には、S120〜S140の認証用処理を行い、該認証用処理によって認証に成功したならば、S150にてメモリへのデータ書き込みを行う。また、アクセス制御部は、上記S110にて、車両衝突が検出されたと判定した場合には、認証用処理を行うことなく、S150にてメモリへのデータ書き込みを行う。【選択図】図3