WO2008087734A1 - 暗号文生成装置及び暗号通信システム及び群パラメータ生成装置 - Google Patents

暗号文生成装置及び暗号通信システム及び群パラメータ生成装置 Download PDF

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Publication number
WO2008087734A1
WO2008087734A1 PCT/JP2007/050766 JP2007050766W WO2008087734A1 WO 2008087734 A1 WO2008087734 A1 WO 2008087734A1 JP 2007050766 W JP2007050766 W JP 2007050766W WO 2008087734 A1 WO2008087734 A1 WO 2008087734A1
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WIPO (PCT)
Prior art keywords
cryptogram
generating device
generating section
integer
communication system
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PCT/JP2007/050766
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English (en)
French (fr)
Inventor
Katsuyuki Takashima
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Mitsubishi Electric Corporation
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Application filed by Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to JP2008553935A priority Critical patent/JP4859933B2/ja
Priority to EP07713653.9A priority patent/EP2120227B1/en
Priority to CN200780051866.3A priority patent/CN101617351B/zh
Priority to US12/523,827 priority patent/US8290146B2/en
Priority to PCT/JP2007/050766 priority patent/WO2008087734A1/ja
Publication of WO2008087734A1 publication Critical patent/WO2008087734A1/ja

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
    • H04L9/3073—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Algebra (AREA)
  • Computing Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Computer And Data Communications (AREA)

Abstract

　乱数生成部２２２は、整数ｓをランダムに生成する。第一暗号文生成部２４１は、整数ｓに基づいて平文Ｍを暗号化して第一暗号文Ｃ１を生成する。第二暗号文生成部２４２は、整数ｓと受信者ＩＤとに基づいて、第二暗号文Ｃ２を生成する。第三暗号文生成部２４３は、整数ｓに基づいて第三暗号文Ｃ３を生成する。ハッシュ値算出部２４４は、第一暗号文Ｃ１と第二暗号文Ｃ２と第三暗号文Ｃ３とを結合してハッシュ値Ｈ０を算出する。第四暗号文生成部２４５は、ハッシュ値Ｈ０に基づいて、第四暗号文Ｃ４を生成する。暗号文結合部２４６は、第一暗号文Ｃ１と第二暗号文Ｃ２と第三暗号文Ｃ３と第四暗号文Ｃ４とを結合して、暗号文Ｃを生成する。これにより、同一の平文を暗号化した暗号文を複数受信者に対して送信しても安全なＩＤベース公開鍵暗号通信システムを提供できる。
PCT/JP2007/050766 2007-01-19 2007-01-19 暗号文生成装置及び暗号通信システム及び群パラメータ生成装置 WO2008087734A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2008553935A JP4859933B2 (ja) 2007-01-19 2007-01-19 暗号文生成装置及び暗号通信システム及び群パラメータ生成装置
EP07713653.9A EP2120227B1 (en) 2007-01-19 2007-01-19 Cryptogram generating device, cryptogram communication system, and group parameter generating device
CN200780051866.3A CN101617351B (zh) 2007-01-19 2007-01-19 密文生成装置、密码通信系统以及群参数生成装置
US12/523,827 US8290146B2 (en) 2007-01-19 2007-01-19 Ciphertext generating apparatus, cryptographic communication system, and group parameter generating apparatus
PCT/JP2007/050766 WO2008087734A1 (ja) 2007-01-19 2007-01-19 暗号文生成装置及び暗号通信システム及び群パラメータ生成装置

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PCT/JP2007/050766 WO2008087734A1 (ja) 2007-01-19 2007-01-19 暗号文生成装置及び暗号通信システム及び群パラメータ生成装置

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WO2008087734A1 true WO2008087734A1 (ja) 2008-07-24

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US (1) US8290146B2 (ja)
EP (1) EP2120227B1 (ja)
JP (1) JP4859933B2 (ja)
CN (1) CN101617351B (ja)
WO (1) WO2008087734A1 (ja)

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CN101938481A (zh) * 2010-09-06 2011-01-05 华南理工大学 基于数字证书的文件加密和分发方法
CN103370660A (zh) * 2011-02-16 2013-10-23 三菱电机株式会社 可编程逻辑控制器以及可编程逻辑控制器的密码保存方法
US10404718B2 (en) * 2015-12-17 2019-09-03 Robert Bosch Gmbh Method and device for transmitting software

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EP2120227A1 (en) 2009-11-18
EP2120227A4 (en) 2012-05-30
JP4859933B2 (ja) 2012-01-25
US8290146B2 (en) 2012-10-16
CN101617351B (zh) 2011-06-22
JPWO2008087734A1 (ja) 2010-05-06
US20100104094A1 (en) 2010-04-29
EP2120227B1 (en) 2015-04-15
CN101617351A (zh) 2009-12-30

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