IT1244351B - Sistema e dispositivi per la crittografia di segnali digitali - Google Patents

Sistema e dispositivi per la crittografia di segnali digitali

Info

Publication number
IT1244351B
IT1244351B IT02249790A IT2249790A IT1244351B IT 1244351 B IT1244351 B IT 1244351B IT 02249790 A IT02249790 A IT 02249790A IT 2249790 A IT2249790 A IT 2249790A IT 1244351 B IT1244351 B IT 1244351B
Authority
IT
Italy
Prior art keywords
devices
digital signal
encryption system
signal encryption
digital
Prior art date
Application number
IT02249790A
Other languages
English (en)
Other versions
IT9022497A1 (it
IT9022497A0 (it
Inventor
Silvio Cucchi
Roberto Maestri
Giorgio Parladori
Original Assignee
Telettra Spa
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 Telettra Spa filed Critical Telettra Spa
Priority to IT02249790A priority Critical patent/IT1244351B/it
Publication of IT9022497A0 publication Critical patent/IT9022497A0/it
Priority to EP19910121895 priority patent/EP0492486A3/en
Publication of IT9022497A1 publication Critical patent/IT9022497A1/it
Application granted granted Critical
Publication of IT1244351B publication Critical patent/IT1244351B/it

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
    • 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
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2541—Rights Management
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
IT02249790A 1990-12-21 1990-12-21 Sistema e dispositivi per la crittografia di segnali digitali IT1244351B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT02249790A IT1244351B (it) 1990-12-21 1990-12-21 Sistema e dispositivi per la crittografia di segnali digitali
EP19910121895 EP0492486A3 (en) 1990-12-21 1991-12-20 Systems and devices for the cryptography of digital signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT02249790A IT1244351B (it) 1990-12-21 1990-12-21 Sistema e dispositivi per la crittografia di segnali digitali

Publications (3)

Publication Number Publication Date
IT9022497A0 IT9022497A0 (it) 1990-12-21
IT9022497A1 IT9022497A1 (it) 1992-06-21
IT1244351B true IT1244351B (it) 1994-07-08

Family

ID=11197072

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02249790A IT1244351B (it) 1990-12-21 1990-12-21 Sistema e dispositivi per la crittografia di segnali digitali

Country Status (2)

Country Link
EP (1) EP0492486A3 (it)
IT (1) IT1244351B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06311119A (ja) * 1993-04-20 1994-11-04 Sony Corp データ放送システム
CN1127240C (zh) * 1998-08-26 2003-11-05 英业达股份有限公司 多媒体数据的保密方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613901A (en) * 1983-05-27 1986-09-23 M/A-Com Linkabit, Inc. Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
US4634808A (en) * 1984-03-15 1987-01-06 M/A-Com Government Systems, Inc. Descrambler subscriber key production system utilizing key seeds stored in descrambler
DE3640680A1 (de) * 1986-11-28 1988-06-09 Siemens Ag Bildfernsprecher
US4864615A (en) * 1988-05-27 1989-09-05 General Instrument Corporation Reproduction of secure keys by using distributed key generation data

Also Published As

Publication number Publication date
EP0492486A3 (en) 1992-11-04
EP0492486A2 (en) 1992-07-01
IT9022497A1 (it) 1992-06-21
IT9022497A0 (it) 1990-12-21

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19931221