FR2735603B1 - CRYPT AUDIONUMERIC SIGNAL DECODER - Google Patents

CRYPT AUDIONUMERIC SIGNAL DECODER

Info

Publication number
FR2735603B1
FR2735603B1 FR9507225A FR9507225A FR2735603B1 FR 2735603 B1 FR2735603 B1 FR 2735603B1 FR 9507225 A FR9507225 A FR 9507225A FR 9507225 A FR9507225 A FR 9507225A FR 2735603 B1 FR2735603 B1 FR 2735603B1
Authority
FR
France
Prior art keywords
audionumeric
crypt
signal decoder
decoder
signal
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
FR9507225A
Other languages
French (fr)
Other versions
FR2735603A1 (en
Inventor
Francois Devaux
Jean Claude Huot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales Information Systems SA
Original Assignee
Syseca SA
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 Syseca SA filed Critical Syseca SA
Priority to FR9507225A priority Critical patent/FR2735603B1/en
Publication of FR2735603A1 publication Critical patent/FR2735603A1/en
Application granted granted Critical
Publication of FR2735603B1 publication Critical patent/FR2735603B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00224—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is obtained from a remote server
    • 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
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00413—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is input by a user
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
    • 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
    • G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
FR9507225A 1995-06-16 1995-06-16 CRYPT AUDIONUMERIC SIGNAL DECODER Expired - Lifetime FR2735603B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9507225A FR2735603B1 (en) 1995-06-16 1995-06-16 CRYPT AUDIONUMERIC SIGNAL DECODER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9507225A FR2735603B1 (en) 1995-06-16 1995-06-16 CRYPT AUDIONUMERIC SIGNAL DECODER

Publications (2)

Publication Number Publication Date
FR2735603A1 FR2735603A1 (en) 1996-12-20
FR2735603B1 true FR2735603B1 (en) 1997-07-25

Family

ID=9480085

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9507225A Expired - Lifetime FR2735603B1 (en) 1995-06-16 1995-06-16 CRYPT AUDIONUMERIC SIGNAL DECODER

Country Status (1)

Country Link
FR (1) FR2735603B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751732A (en) * 1984-07-06 1988-06-14 Kabushiki Kaisha Toshiba Broadcasting system
US4907273A (en) * 1984-10-12 1990-03-06 Wiedemer John D High security pay television system
US4893339A (en) * 1986-09-03 1990-01-09 Motorola, Inc. Secure communication system
US5050213A (en) * 1986-10-14 1991-09-17 Electronic Publishing Resources, Inc. Database usage metering and protection system and method
FR2609589A1 (en) * 1987-01-09 1988-07-15 Videostone Electronique METHODS AND DEVICES FOR PROJECTING TELEVISION PROGRAMS ON A SCREEN OF A SHOWROOM
US5199074A (en) * 1992-01-06 1993-03-30 Advanced Micro Devices, Inc. Encryption system

Also Published As

Publication number Publication date
FR2735603A1 (en) 1996-12-20

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
GC Lien (pledge) constituted
CD Change of name or company name
RG Lien (pledge) cancelled
RG Lien (pledge) cancelled