ATTACK DETECTION DEVICE AND ATTACK DETECTION METHOD

To provide a technique that can improve safety of an information processing device.SOLUTION: An attack detection device 1 includes a power supply fingerprint authentication unit 20, a voltage attack detection unit 30, and a processing unit 10. The voltage attack detection unit 30 detects a voltage a...

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Bibliographic Details
Main Authors KII YASUYUKI, SUGAWARA TAKAHIKO, KISHIDA HARUNOBU, MATSUYAMA NAOKI
Format Patent
LanguageEnglish
Japanese
Published 19.11.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:To provide a technique that can improve safety of an information processing device.SOLUTION: An attack detection device 1 includes a power supply fingerprint authentication unit 20, a voltage attack detection unit 30, and a processing unit 10. The voltage attack detection unit 30 detects a voltage abnormality caused by an attack in power supply voltage applied to a power supply line L1 that connects an information processing device 6 executing first processing and second processing in this order and a power supply circuit 5 to each other. The power supply fingerprint authentication unit 20 detects a power supply current flowing through the power supply line L1 during the execution of the first processing by the information processing device 6, and executes first similarity/dissimilarity determination to determine whether or not a current pattern indicating a time-series change of the power supply current is similar to a preset reference pattern corresponding to the first processing. When a first condition that the voltage abnormality is detected or a second condition that the current pattern is not similar to the reference pattern in the result of the first similarity/dissimilarity determination is satisfied, the processing unit 10 prohibits the execution of the second processing by the information processing device 6.SELECTED DRAWING: Figure 1 【課題】情報処理装置の安全性を向上することができる技術を提供する。【解決手段】攻撃検出装置１は電源指紋認証部２０と電圧攻撃検出部３０と処理部１０とを備える。電圧攻撃検出部３０は、第１処理および第２処理をこの順に実行する情報処理装置６、および、電源回路５を互いに接続する電源ラインＬ１に印加される電源電圧に生じた、攻撃による電圧異常を検出する。電源指紋認証部２０は、電源ラインＬ１を流れる電源電流を、情報処理装置６による第１処理の実行中に検出し、電源電流の時系列変化を示す電流パターンが、第１処理に対応して予め設定された基準パターンと類似しているか否かを判定する第１類否判定を行う。処理部１０は、電圧異常の検出という第１条件、または、第１類否判定の結果おいて、電流パターンが基準パターンと類似していないという第２条件が成立したときに、情報処理装置６による第２処理の実行を禁止する。【選択図】図１
Bibliography:Application Number: JP20190090199