識別ベースの暗号化システム - Voltage Security, Incorporated

Title:

識別ベースの暗号化システム

Document Type and Number:

Japanese Patent JP4571865

Kind Code:

B2

Abstract:

A system is provided that uses identity-based encryption to support secure communications. Messages from a sender to a receiver may be encrypted using the receiver's identity and public parameters that have been generated by a private key generator associated with the receiver. The private key generator associated with the receiver generates a private key for the receiver. The encrypted message may be decrypted by the receiver using the receiver's private key. The system may have multiple private key generators, each with a separate set of public parameters. Directory services may be used to provide a sender that is associated with one private key generator with appropriate public parameters to use when encrypting messages for a receiver that is associated with a different private key generator. A certification authority may be used to sign directory entries for the directory service. A clearinghouse may be used to avoid duplicative directory entries.

Inventors:

Appenzeller, Guido
Poker, Matthew Jay.
Kucker, Richard.

Application Number:

JP2004553692A

Publication Date:

October 27, 2010

Filing Date:

November 12, 2003

Export Citation:

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Assignee:

Voltage Security, Incorporated

International Classes:

H04L9/08; H04L9/30

Other References:

Craig Gentry and Alice Silverberg,Hierarchical ID-Based Cryptography,Cryptology ePrint Archive: Report 2002/056,2002年 5月24日,URL,http://eprint.iacr.org/2002/056
Marco Casassa Mont, Keith Harrison, Martin Sadler,The HP Time Vault Service: Innovating the Way Confidential Information is Disclosed, at the Right Time,HPL-2002-243,Hewlett-Packard Company,2002年 9月 4日,URL,http://www.hpl.hp.com/techreports/2002/HPL-2002-243.html

Attorney, Agent or Firm:

Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita

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