Patent ID: 8424054
Filing Date: 2013-04-16
Classification: H04L

Abstract:
1. A secret information management apparatus extracting a combination of users who become administrators of two or more pieces of divided secret information to be divided from an original set of secret information, the combination of users selected out of a plurality of users, the secret information management apparatus comprising: a user role information obtaining unit for obtaining user role information showing a role possessed by each of the plurality of users; a specified role information obtaining unit for obtaining specified role information showing two or more roles as a specified role; and a user extracting unit for comparing the role of each user shown in the user role information with each specified role shown in the specified role information, extracting a user possessing a role matched for each specified role, combining users extracted according to a combination of specified roles, wherein the combination of specified roles is based on inclusion, exclusion or hierarchy rules, and generating the combination of users who become administrators of divided secret information based on the combination of specified roles, the combination being at least two users who will share the original set of secret information such that the original set of secret information cannot be reconstructed unless all of the users in the combination of users provide their pieces of divided secret information.