WO2003030447A3 - An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device - Google Patents

An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device Download PDF

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Publication number
WO2003030447A3
WO2003030447A3 PCT/JP2002/009245 JP0209245W WO03030447A3 WO 2003030447 A3 WO2003030447 A3 WO 2003030447A3 JP 0209245 W JP0209245 W JP 0209245W WO 03030447 A3 WO03030447 A3 WO 03030447A3
Authority
WO
WIPO (PCT)
Prior art keywords
key
decrypting
memory unit
unit
secret key
Prior art date
Application number
PCT/JP2002/009245
Other languages
French (fr)
Other versions
WO2003030447A2 (en
Inventor
Motoji Ohmori
Makoto Tatebayashi
Takahiro Nagai
Hideshi Ishihara
Original Assignee
Matsushita Electric Ind Co Ltd
Motoji Ohmori
Makoto Tatebayashi
Takahiro Nagai
Hideshi Ishihara
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 Matsushita Electric Ind Co Ltd, Motoji Ohmori, Makoto Tatebayashi, Takahiro Nagai, Hideshi Ishihara filed Critical Matsushita Electric Ind Co Ltd
Priority to HU0401720A priority Critical patent/HUP0401720A2/en
Priority to AU2002334409A priority patent/AU2002334409A1/en
Priority to US10/490,346 priority patent/US7542568B2/en
Priority to MXPA04002721A priority patent/MXPA04002721A/en
Priority to EP02800230A priority patent/EP1430641A2/en
Priority to KR10-2004-7004596A priority patent/KR20040039443A/en
Publication of WO2003030447A2 publication Critical patent/WO2003030447A2/en
Publication of WO2003030447A3 publication Critical patent/WO2003030447A3/en
Priority to US12/431,148 priority patent/US20090208007A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/22—Arrangements for preventing the taking of data from a data transmission channel without authorisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • 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
    • H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
    • 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
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H04L9/3268—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]
    • 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
    • H04L2209/603—Digital right managament [DRM]

Abstract

An encryption device, a decrypting device, a secret key generation device, a copyright protection system and a cipher communication device comprise: a CRL memory unit 111 that memorizes a CRL, a device key ring memory unit 112 that memorizes a peculiar device key KD A in every IC card 210a used in a decrypting device 200a, a content key memory unit 113 that memorizes a content key Kc which is a secret key for decrypting content, a hashing function processing unit 114 that calculates a hashing value of the CRL memorized in the CRL memory unit 111, an Ex-OR unit 115 that carries out an exclusive OR between the hashing value and the device key KD A memorized in the device key ring memory unit 112, and an Enc unit 116 that encrypts the content key Kc memorized in the content key memory unit 113 with an output value of an Ex-OR unit 115.
PCT/JP2002/009245 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device WO2003030447A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
HU0401720A HUP0401720A2 (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device, a copyright protection system and a cipher communication device
AU2002334409A AU2002334409A1 (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device
US10/490,346 US7542568B2 (en) 2001-09-27 2002-09-11 Encryption device a decrypting device a secret key generation device a copyright protection system and a cipher communication device
MXPA04002721A MXPA04002721A (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device.
EP02800230A EP1430641A2 (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device
KR10-2004-7004596A KR20040039443A (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device, a copyright protection system and a cipher communication device
US12/431,148 US20090208007A1 (en) 2001-09-27 2009-04-28 Encryption device, a decrypting device, a secret key generation device, a copyright protection system and a cipher communication device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001-298414 2001-09-27
JP2001298414 2001-09-27
JP2001374856 2001-12-07
JP2001-374856 2001-12-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/431,148 Division US20090208007A1 (en) 2001-09-27 2009-04-28 Encryption device, a decrypting device, a secret key generation device, a copyright protection system and a cipher communication device

Publications (2)

Publication Number Publication Date
WO2003030447A2 WO2003030447A2 (en) 2003-04-10
WO2003030447A3 true WO2003030447A3 (en) 2003-12-31

Family

ID=26623168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/009245 WO2003030447A2 (en) 2001-09-27 2002-09-11 An encryption device, a decrypting device, a secret key generation device,a copyright protection system and a cipher communication device

Country Status (9)

Country Link
US (2) US7542568B2 (en)
EP (1) EP1430641A2 (en)
JP (1) JP2009044773A (en)
KR (1) KR20040039443A (en)
CN (1) CN100452699C (en)
AU (1) AU2002334409A1 (en)
HU (1) HUP0401720A2 (en)
MX (1) MXPA04002721A (en)
WO (1) WO2003030447A2 (en)

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Also Published As

Publication number Publication date
AU2002334409A1 (en) 2003-04-14
HUP0401720A2 (en) 2005-07-28
MXPA04002721A (en) 2004-07-05
EP1430641A2 (en) 2004-06-23
US20050021941A1 (en) 2005-01-27
WO2003030447A2 (en) 2003-04-10
CN1596522A (en) 2005-03-16
KR20040039443A (en) 2004-05-10
US20090208007A1 (en) 2009-08-20
CN100452699C (en) 2009-01-14
US7542568B2 (en) 2009-06-02
JP2009044773A (en) 2009-02-26

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