Global Patent Index - EP 1259865 A2

EP 1259865 A2 2002-11-27 - METHOD OF PRE-RELEASING ENCRYPTED DIGITAL DATA

Title (en)

METHOD OF PRE-RELEASING ENCRYPTED DIGITAL DATA

Title (de)

VERFAHREN ZUR VOR DEM VERKAUF VERÖFFENTLICHUNG VON VERSCHLÜSSELTEN DIGITALEN DATEN

Title (fr)

METHODE DE PREDIFFUSION D'UN CONTENU NUMERIQUE ET BASE DE DONNEES A CLE DE CRYPTAGE A UTILISER AVEC CETTE METHODE

Publication

EP 1259865 A2 (EN)

Application

EP 00992916 A

Priority

  • US 0042780 W
  • US 46472499 A

Abstract (en)

[origin: WO0146782A2] A method for pre-releasing digital content is disclosed. A release time for the digital content is determined and the digital content is encrypted with an encryption key. The encrypted digital cotent is decryptable by a decryption key corresponding to the encryption key. The encrypted digital content is distributed to at least one content user prior to the release time, and the decryption key for the encrypted digital content is released to the content user at the release time. The content user may then decrypt the encrypted digital content with the released decryption key at or after the release time. The encryption key may be selected from an encryption key database having a plurality of entries, where each entry includes a release time for releasing a piece of digital content, and an encryption key for encrypting the digital content that is to be released at the release time.

IPC 1-7 (main, further and additional classification)

G06F 1/00

IPC 8 full level (invention and additional information)

G06F 12/14 (2006.01); G06F 21/10 (2013.01); H04L 9/08 (2006.01)

CPC (invention and additional information)

G06F 21/10 (2013.01)

Citation (search report)

See references of WO 0146782A3

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0146782 A2 20010628; WO 0146782 A3 20020912; AU 4717401 A 20010703; EP 1259865 A2 20021127; JP 2003519942 A 20030624

INPADOC legal status


2009-02-04 [18R] REFUSED

- Effective date: 20081210

2004-04-28 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040310

2002-11-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020617

2002-11-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-11-27 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI