IC CHIP AND IC CARD

• Main Authors: MATSUMURA SHUICHI, OISHI HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 23.01.2020
• Subjects: ADVERTISING; BOOK COVERS; BOOKBINDING; CALCULATING; CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY; COMPUTING; COUNTING; CRYPTOGRAPHY; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; FILES; HANDLING RECORD CARRIERS; LOOSE LEAVES; MOVABLE-STRIP WRITING OR READING APPARATUS; PERFORMING OPERATIONS; PHYSICS; PRESENTATION OF DATA; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; RECOGNITION OF DATA; RECORD CARRIERS; SEALS; SPECIAL PRINTED MATTER; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; TRANSPORTING

To adjust electric energy that a circuit for a security countermeasure in an IC card consumes.SOLUTION: An IC chip comprising multiple ways of a security processing means that operate according to an electric power level of a power source, an electric power level sensor, and a security countermeasure level alternation means, where the security countermeasure level alternation means selects each security processing means dynamically to make it operate based on the electric energy level that the electric energy level sensor detected so that consumption power can be reduced is used for an IC card.SELECTED DRAWING: Figure 2 【課題】ＩＣカードのセキュリティ対策の回路が消費する電力量を適正化する。【解決手段】ＩＣカードに用いるＩＣチップに、電源の電力レベルに応じて動作する複数のセキュリティ処理手段と、電源の電力レベルを測定する電力レベルセンサとセキュリティ対策レベル変更手段を備え、前記セキュリティ対策レベル変更手段が、前記電力レベルセンサが検出した電源の電力レベルに基づき、各セキュリティ処理手段を動的に選択して動作させることで消費電力を低減するＩＣチップを用いる。【選択図】図２