Title:
【発明の名称】独占データの暗号化キー漏洩者を識別するためのプロセス
Document Type and Number:
Japanese Patent JP2001523018
Kind Code:
A
Abstract:
A method for identifying betrayers of proprietary data which enables a betrayer, i.e., an authorized subscriber who has disclosed one of his partial keys to a third person without authorization, to be unequivocally identified. A respective subset of encryption keys is assigned to each authorized subscriber according to finite geometric structures and methods such that the necessary characteristic of the k-resilience used for identifying a betrayer is guaranteed. A betrayer search algorithm is used for the unequivocal identification of a betrayer. Coalitions of betrayers may also be unequivocally identified.
Inventors:
Schwenck, Jürg
Weberberg, Johannes
Weberberg, Johannes
Application Number:
JP2000519971A
Publication Date:
November 20, 2001
Filing Date:
November 04, 1998
Export Citation:
Assignee:
Deutsche Telecom AG
International Classes:
G06F1/00; G06F21/62; H04L9/08; G09C1/00; (IPC1-7): G09C1/00; H04L9/08
Attorney, Agent or Firm:
Masao Okabe (11 others)