CA2234982A1 - Apparatus and method for encrypting mpeg packets - Google Patents

Apparatus and method for encrypting mpeg packets

Info

Publication number
CA2234982A1
CA2234982A1 CA002234982A CA2234982A CA2234982A1 CA 2234982 A1 CA2234982 A1 CA 2234982A1 CA 002234982 A CA002234982 A CA 002234982A CA 2234982 A CA2234982 A CA 2234982A CA 2234982 A1 CA2234982 A1 CA 2234982A1
Authority
CA
Canada
Prior art keywords
block
length
block length
clear
encrypting
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.)
Granted
Application number
CA002234982A
Other languages
French (fr)
Other versions
CA2234982C (en
Inventor
Howard George Pinder
Michael Steven Palgon
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.)
Scientific Atlanta LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2234982A1 publication Critical patent/CA2234982A1/en
Application granted granted Critical
Publication of CA2234982C publication Critical patent/CA2234982C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • 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

Abstract

A method of encrypting clear payload data to form encrypted payload data uses a block cipher, the block cipher being characterized by a predetermined block length. The method includes a step of parsing (7) and first and second steps of encrypting (8). The step of parsing parses (7) the clear payload data into at least one full clear block. Each full clear block is characterized by the predetermined block length. The residual block is characterized by a residual block length, the residual block length being less than the predetermined block length. The step of parsing further parses (7) the last full clear block into a first part and a second part, the second part being characterized by a length equaling a difference between the predetermined block length and the residual block length.
CA002234982A 1995-11-15 1996-11-14 Apparatus and method for encrypting mpeg packets Expired - Lifetime CA2234982C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US679195P 1995-11-15 1995-11-15
US60/006,791 1995-11-15
US08/710,842 1996-09-23
US08/710,842 US5684876A (en) 1995-11-15 1996-09-23 Apparatus and method for cipher stealing when encrypting MPEG transport packets
PCT/US1996/018230 WO1997018654A1 (en) 1995-11-15 1996-11-14 Apparatus and method for encrypting mpeg packets

Publications (2)

Publication Number Publication Date
CA2234982A1 true CA2234982A1 (en) 1997-05-22
CA2234982C CA2234982C (en) 2001-09-11

Family

ID=26676071

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002234982A Expired - Lifetime CA2234982C (en) 1995-11-15 1996-11-14 Apparatus and method for encrypting mpeg packets

Country Status (8)

Country Link
US (1) US5684876A (en)
EP (1) EP0861540B1 (en)
JP (1) JP3626502B2 (en)
KR (1) KR19990067590A (en)
AU (1) AU702911B2 (en)
CA (1) CA2234982C (en)
DE (1) DE69637865D1 (en)
WO (1) WO1997018654A1 (en)

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Also Published As

Publication number Publication date
JP2000502219A (en) 2000-02-22
JP3626502B2 (en) 2005-03-09
US5684876A (en) 1997-11-04
AU702911B2 (en) 1999-03-11
EP0861540A4 (en) 2001-12-12
CA2234982C (en) 2001-09-11
EP0861540A1 (en) 1998-09-02
AU1119497A (en) 1997-06-05
KR19990067590A (en) 1999-08-25
DE69637865D1 (en) 2009-04-23
WO1997018654A1 (en) 1997-05-22
EP0861540B1 (en) 2009-03-11

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20161114

MKEX Expiry

Effective date: 20161114