WO2002063852A3 - Method and apparatus for partial encryption of contents - Google Patents

Method and apparatus for partial encryption of contents Download PDF

Info

Publication number
WO2002063852A3
WO2002063852A3 PCT/US2002/003862 US0203862W WO02063852A3 WO 2002063852 A3 WO2002063852 A3 WO 2002063852A3 US 0203862 W US0203862 W US 0203862W WO 02063852 A3 WO02063852 A3 WO 02063852A3
Authority
WO
WIPO (PCT)
Prior art keywords
file
information
contents
partial encryption
encrypting
Prior art date
Application number
PCT/US2002/003862
Other languages
French (fr)
Other versions
WO2002063852A2 (en
Inventor
Cormac Herley
Yihong Yu
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Priority to EP20020706218 priority Critical patent/EP1358750A2/en
Priority to JP2002563680A priority patent/JP2004529409A/en
Publication of WO2002063852A2 publication Critical patent/WO2002063852A2/en
Publication of WO2002063852A3 publication Critical patent/WO2002063852A3/en

Links

Classifications

    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C5/00—Ciphering apparatus or methods not provided for in the preceding groups, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • 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
    • 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
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3006—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
    • H04L9/302—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters involving the integer factorization problem, e.g. RSA or quadratic sieve [QS] schemes

Abstract

The present invention is directed to methods and apparatus that partially encrypt an information data file. An exemplary method includes dividing (210) the information file into a first file (310) and a second file (320), wherein the second file includes content from the information file to preclude reconstruction of the information file using only the first file, and encrypting (215) the second file. Additionally, the method provides for transmitting the first file and the encrypted second file from a first device (510) to a second device (530).
PCT/US2002/003862 2001-02-06 2002-02-05 Method and apparatus for partial encryption of contents WO2002063852A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020706218 EP1358750A2 (en) 2001-02-06 2002-02-05 Method and apparatus for partial encryption of contents
JP2002563680A JP2004529409A (en) 2001-02-06 2002-02-05 Method and apparatus for partial encryption of content

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/776,680 2001-02-06
US09/776,680 US6976166B2 (en) 2001-02-06 2001-02-06 Method and apparatus for partial encryption of content

Publications (2)

Publication Number Publication Date
WO2002063852A2 WO2002063852A2 (en) 2002-08-15
WO2002063852A3 true WO2002063852A3 (en) 2002-12-12

Family

ID=25108098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/003862 WO2002063852A2 (en) 2001-02-06 2002-02-05 Method and apparatus for partial encryption of contents

Country Status (4)

Country Link
US (1) US6976166B2 (en)
EP (1) EP1358750A2 (en)
JP (1) JP2004529409A (en)
WO (1) WO2002063852A2 (en)

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Also Published As

Publication number Publication date
US20020108035A1 (en) 2002-08-08
US6976166B2 (en) 2005-12-13
JP2004529409A (en) 2004-09-24
EP1358750A2 (en) 2003-11-05
WO2002063852A2 (en) 2002-08-15

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