IN2014CN04110A - - Google Patents

Info

Publication number
IN2014CN04110A
IN2014CN04110A IN4110CHN2014A IN2014CN04110A IN 2014CN04110 A IN2014CN04110 A IN 2014CN04110A IN 4110CHN2014 A IN4110CHN2014 A IN 4110CHN2014A IN 2014CN04110 A IN2014CN04110 A IN 2014CN04110A
Authority
IN
India
Prior art keywords
vector
basis
key
private key
encrypted
Prior art date
Application number
Inventor
Katsuyuki Takashima
Tatsuaki Okamoto
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph & Telephone
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Nippon Telegraph & Telephone filed Critical Mitsubishi Electric Corp
Publication of IN2014CN04110A publication Critical patent/IN2014CN04110A/en

Links

Classifications

    • 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
    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/601—Broadcast encryption

Landscapes

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

Abstract

The purpose of the present invention is to reduce the size of the public parameter and master private key and to shorten the time required for generation processing and encryption processing of the private key given to the user. Using a sparse matrix having at least one value other than 0 in each row and each column a key generator (100) generates a basis B and a basis B* that become the public parameter and the master private key. An encryption device (200) generates as the encrypted vector a vector which is in basis B and in which prescribed information is embedded and with a prescribed vector in basis B* as a key vector a decryption device (300) performs pairing calculations on the encrypted vector and the key vector and decrypts the encrypted vector.
IN4110CHN2014 2011-11-18 2012-11-12 IN2014CN04110A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011252244A JP5677273B2 (en) 2011-11-18 2011-11-18 Cryptographic processing system, cryptographic processing method, cryptographic processing program, and key generation apparatus
PCT/JP2012/079210 WO2013073488A1 (en) 2011-11-18 2012-11-12 Encryption processing system, encryption processing method, encryption processing program and key generator

Publications (1)

Publication Number Publication Date
IN2014CN04110A true IN2014CN04110A (en) 2015-07-10

Family

ID=48429548

Family Applications (1)

Application Number Title Priority Date Filing Date
IN4110CHN2014 IN2014CN04110A (en) 2011-11-18 2012-11-12

Country Status (8)

Country Link
US (1) US9203622B2 (en)
EP (1) EP2782087B1 (en)
JP (1) JP5677273B2 (en)
KR (1) KR101581605B1 (en)
CN (1) CN103946910B (en)
ES (1) ES2613811T3 (en)
IN (1) IN2014CN04110A (en)
WO (1) WO2013073488A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013146865A1 (en) * 2012-03-27 2013-10-03 三菱電機株式会社 Digital broadcast receiver device and digital broadcast receiving method
JP6275536B2 (en) * 2014-04-16 2018-02-07 日本放送協会 Conditional reception system, content distribution apparatus, content reception apparatus and program thereof
US10454673B2 (en) * 2014-12-05 2019-10-22 Mitsubishi Electric Corporation Cryptographic system, master key update apparatus, and non-transitory computer-readable recording medium storing master key update program
DE112014007226B4 (en) * 2014-12-05 2023-09-07 Mitsubishi Electric Corporation Decryption condition adding device, cryptographic system and decryption condition adding program
US9516000B2 (en) * 2015-03-27 2016-12-06 International Business Machines Corporation Runtime instantiation of broadcast encryption schemes
US10205713B2 (en) * 2017-04-05 2019-02-12 Fujitsu Limited Private and mutually authenticated key exchange
JP6971917B2 (en) * 2018-06-11 2021-11-24 三菱電機株式会社 Decoding device, encryption device and encryption system
JP7024666B2 (en) * 2018-08-28 2022-02-24 日本電信電話株式会社 ID-based hash certification system configuration device, ID-based cryptographic device and program

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JP4354609B2 (en) * 1999-07-16 2009-10-28 パナソニック株式会社 Simultaneous equation solving apparatus and inverse element computing apparatus on finite field
JP2003152703A (en) * 2001-11-12 2003-05-23 Victor Co Of Japan Ltd Encryption device, encryption method, decryption device, decryption method, encryption decryption device and encryption decryption method
KR100604828B1 (en) * 2004-01-09 2006-07-28 삼성전자주식회사 Method for executing encryption and decryption of firmware and apparatus thereof
US7634085B1 (en) 2005-03-25 2009-12-15 Voltage Security, Inc. Identity-based-encryption system with partial attribute matching
JP2007299088A (en) * 2006-04-28 2007-11-15 Fujitsu Ltd Data protection system, method and program
US20090080658A1 (en) 2007-07-13 2009-03-26 Brent Waters Method and apparatus for encrypting data for fine-grained access control
CN101971186B (en) * 2008-04-10 2013-06-12 日本电气株式会社 Information leak prevention device, and method and program thereof
CN101329869B (en) * 2008-07-31 2012-04-11 中国电信股份有限公司 System and method for encrypting acoustic source of speech encoding for vector quantization
JP5349261B2 (en) 2009-04-23 2013-11-20 三菱電機株式会社 Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
ES2516390T3 (en) * 2009-04-24 2014-10-30 Nippon Telegraph And Telephone Corporation Cryptographic system, cryptographic communication method, encryption device, key generation device, decryption device, content server, program, and storage medium
WO2010123116A1 (en) * 2009-04-24 2010-10-28 日本電信電話株式会社 Information generating device, information generating method, and information generating program and storage medium thereof
JP5334873B2 (en) 2010-01-08 2013-11-06 三菱電機株式会社 Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
US8615668B2 (en) * 2010-01-15 2013-12-24 Mitsubishi Electric Corporation Confidential search system and cryptographic processing system
JP5424974B2 (en) 2010-04-27 2014-02-26 三菱電機株式会社 Cryptographic processing system, key generation device, encryption device, decryption device, signature processing system, signature device, and verification device
KR101418254B1 (en) * 2010-07-23 2014-07-10 니폰 덴신 덴와 가부시끼가이샤 Cryptosystem, cryptographic communication method, encryption device, key-generating device, decryption device, content server device, program, and recording medium
US8977579B2 (en) * 2011-10-11 2015-03-10 Nec Laboratories America, Inc. Latent factor dependency structure determination

Also Published As

Publication number Publication date
JP2013109048A (en) 2013-06-06
CN103946910B (en) 2017-05-31
US9203622B2 (en) 2015-12-01
WO2013073488A1 (en) 2013-05-23
CN103946910A (en) 2014-07-23
JP5677273B2 (en) 2015-02-25
EP2782087A4 (en) 2015-09-09
EP2782087A1 (en) 2014-09-24
EP2782087B1 (en) 2016-12-28
ES2613811T3 (en) 2017-05-26
KR20140093281A (en) 2014-07-25
KR101581605B1 (en) 2015-12-30
US20140298028A1 (en) 2014-10-02

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