Secret information management scheme based on secret sharing...

Details Secret information management scheme based on secret sharing... Secret information management scheme based on secret sharing...

2005-02-10

2011-12-27

Zia, Syed A. (Department: 2431)

Cryptography

Key management

Key escrow or recovery

C380S028000, C380S277000, C380S047000, C380S046000, C713S171000, C713S168000, C726S002000, C726S003000, C726S005000, C709S217000, C709S218000, C709S219000, C705S071000, C705S064000

Reexamination Certificate

active

08085938

ABSTRACT:
In a secret information management system for managing a secret information of a user, the secret information is divided into a plurality of divided data by using a secret sharing scheme, such that the secret information can be recovered from a prescribed number of the divided data, and a part of the plurality of divided data is stored into a terminal of the user as user's divided data while a rest of the plurality of divided data are stored into one or more of deposit servers. Then, a plurality of re-divided data different from the plurality of divided data are generated, from a combination of the prescribed number of the divided data among the divided data stored in the deposit servers by using the secret sharing scheme, and a part of the plurality of re-divided data is stored into the terminal as newly generated user's divided data while a rest of the plurality of re-divided data are stored into the deposit servers as newly generated divided data.

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