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JP2000259799A Expired / Lapsed JP ⏱️ 0.0 years remaining

IC card and semiconductor integrated circuit device

Assignee: Hitachi Ltd
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Filing: 1999-03-09
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Granted: —
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Expires: 2019-03-09
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 機密保護の強化を実現したICカードと半導 体集積回路装置を提供する。 【解決手段】 データ処理装置とかかるデータ処理装置 によるセキュリティ情報処理を含むデータ処理手順が書 き込まれたROMを含み、外部端子がリードライト装置 のような外部装置と電気的に接続されることによって動 作電圧が供給され、データ処理装置とかかるデータ処理 装置によるデータ処理手順が書き込まれたROMを含 み、上記データ処理手順に従うデータ処理動作が行われ るICカード又は半導体集積回路装置において、上記デ ータ処理手順のタイミングを変化させる手段を設けるこ とより、毎回、暗号処理の手順やタイミングが変わり時 間軸でみた場合の消費電流波形が変化するため、電流波 形を上記のように時間軸上で比較するというデータ依存 性の解析を実質的に不可能にして機密保護を図る。 (57) [Problem] To provide an IC card and a semiconductor integrated circuit device which realize enhanced security. The data processing apparatus includes a ROM in which a data processing procedure including security information processing by the data processing apparatus is written, and operates when an external terminal is electrically connected to an external device such as a read / write device. An IC card or a semiconductor integrated circuit device to which a voltage is supplied and which includes a data processing device and a ROM in which a data processing procedure by the data processing device is written, and in which a data processing operation according to the data processing procedure is performed, By providing the means for changing the timing, the procedure and timing of the encryption process change each time, and the current consumption waveform when viewed on the time axis changes, so the data dependence of comparing the current waveform on the time axis as described above Sexual analysis is virtually impossible to achieve security.

Inventors

  • 👤 Hiroshi Watase
  • 👤 弘 渡瀬
  • 👤 Nobutaka Nagasaki
  • 👤 信孝 長崎
  • 👤 Taku Tsukamoto
  • 👤 卓 塚元
  • 👤 Satoshi Taira
  • 👤 聡 平
  • 👤 雅聡 ▲高▼橋
  • 👤 Masaaki Takahashi
  • 👤 Kunihiko Nakada
  • 👤 邦彦 中田
  • 👤 Chiaki Terauchi
  • 👤 千晶 寺内
  • 👤 Masaru Oki
  • 👤 優 大木
  • 👤 Masahiro Kaminaga
  • 👤 正博 神永

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-02 03:00
CPC Classifications
—

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References Cited (Backward Citations)

JPH02199561A Cited
JPH07239837A Cited
JPH09237130A Cited
JPH10507561A Cited
JPH10170609A Cited
JPH10340183A Cited
JPH1115555A Cited

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