DE68928355T2 - Reproduktion von geschützten Schlüsseln durch Erzeugungsdaten von verteilten Schlüsseln - Google Patents

Reproduktion von geschützten Schlüsseln durch Erzeugungsdaten von verteilten Schlüsseln

Info

Publication number
DE68928355T2
DE68928355T2 DE68928355T DE68928355T DE68928355T2 DE 68928355 T2 DE68928355 T2 DE 68928355T2 DE 68928355 T DE68928355 T DE 68928355T DE 68928355 T DE68928355 T DE 68928355T DE 68928355 T2 DE68928355 T2 DE 68928355T2
Authority
DE
Germany
Prior art keywords
key
program key
distributed
prekey
program
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 - Fee Related
Application number
DE68928355T
Other languages
English (en)
Other versions
DE68928355D1 (de
Inventor
Christopher John Bennett
Paul Moroney
Michael V Harding
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.)
Arris Technology Inc
Original Assignee
Arris Technology Inc
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 Arris Technology Inc filed Critical Arris Technology Inc
Publication of DE68928355D1 publication Critical patent/DE68928355D1/de
Application granted granted Critical
Publication of DE68928355T2 publication Critical patent/DE68928355T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • 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
    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • 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
    • H04L2209/20—Manipulating the length of blocks of bits, e.g. padding or block truncation
DE68928355T 1988-05-27 1989-05-05 Reproduktion von geschützten Schlüsseln durch Erzeugungsdaten von verteilten Schlüsseln Expired - Fee Related DE68928355T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/200,111 US4864615A (en) 1988-05-27 1988-05-27 Reproduction of secure keys by using distributed key generation data

Publications (2)

Publication Number Publication Date
DE68928355D1 DE68928355D1 (de) 1997-11-06
DE68928355T2 true DE68928355T2 (de) 1998-01-15

Family

ID=22740379

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68928355T Expired - Fee Related DE68928355T2 (de) 1988-05-27 1989-05-05 Reproduktion von geschützten Schlüsseln durch Erzeugungsdaten von verteilten Schlüsseln

Country Status (12)

Country Link
US (1) US4864615A (de)
EP (1) EP0343805B1 (de)
JP (1) JPH0816824B2 (de)
AT (1) ATE158914T1 (de)
AU (1) AU605041B2 (de)
CA (1) CA1331790C (de)
DE (1) DE68928355T2 (de)
DK (1) DK259489A (de)
ES (1) ES2107411T3 (de)
HK (1) HK1003498A1 (de)
IE (1) IE62913B1 (de)
NO (1) NO301255B1 (de)

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Also Published As

Publication number Publication date
NO892080L (no) 1989-11-28
IE891504L (en) 1989-11-27
JPH0224694A (ja) 1990-01-26
ATE158914T1 (de) 1997-10-15
NO892080D0 (no) 1989-05-24
DE68928355D1 (de) 1997-11-06
AU605041B2 (en) 1991-01-03
HK1003498A1 (en) 1998-10-30
IE62913B1 (en) 1995-03-08
EP0343805A2 (de) 1989-11-29
US4864615A (en) 1989-09-05
ES2107411T3 (es) 1997-12-01
AU3527289A (en) 1989-11-30
NO301255B1 (no) 1997-09-29
EP0343805A3 (de) 1991-03-13
DK259489A (da) 1989-11-28
EP0343805B1 (de) 1997-10-01
JPH0816824B2 (ja) 1996-02-21
DK259489D0 (da) 1989-05-26
CA1331790C (en) 1994-08-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: GENERAL INSTRUMENT CORP. (N.D.GES.D. STAATES DELAW

8339 Ceased/non-payment of the annual fee