GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 158 081 232 patent documents

This week's update (23/08/2024 12:00 CET):

176 880 new documents added

1 259 676 documents amended

GPI key values

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EP 1540877 A2 20050615 - SECURE COMMUNICATION SYSTEM AND METHOD USING SHARED RANDOM SOURCE FOR KEY CHANGING

Title (en)

SECURE COMMUNICATION SYSTEM AND METHOD USING SHARED RANDOM SOURCE FOR KEY CHANGING

Title (de)

SICHERES KOMMUNIKATIONSSYSTEM UND VERFAHREN ZUR VERWENDUNG EINER GEMEINSAM BENUTZTEN ZUFALLSQUELLE FÜR DEN SCHL SSELWECHSEL

Title (fr)

SYSTEME ET PROCEDE DE COMMUNICATION SECURISEE METTANT EN OEUVRE UNE SOURCE ALEATOIRE PARTAGEE POUR LE CHANGEMENT DE CLE

Publication

EP 1540877 A2 20050615 (EN)

Application

EP 02747644 A 20020716

Priority

IL 0200571 W 20020716

IPC 1-7

H04L 9/08; H04L 9/28

IPC 8 full level

H04L 9/08 (2006.01); H04L 9/28 (2006.01)

CPC (source: EP)

H04L 9/0869 (2013.01); H04L 9/12 (2013.01)

Designated contracting state (EPC)

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

DOCDB simple family (publication)

EP 1540877 A2 20050615; EP 1540877 A4 20080130

DOCDB simple family (application)

EP 02747644 A 20020716