The distributed information generation device and the secret information restoration device, the distributed information generation method, secret information restoration manner and program

摘要

PROBLEM TO BE SOLVED: To provide a secure distributed information generation device etc. capable of reducing the amount of network communication capacity and the amount of storage used in an arbitrary volume.;SOLUTION: Confidential information S is divided into two pieces of information composed of information sizes A and B. While the divided information A is distributed into n pieces of distributed information W₀... W_n-1, the divided information B is reproduced to generate L information. The L pieces of distributed information W_n-L... W_n-1 are extracted out of the distributed n pieces of distributed information and connected with the reproduced L pieces of information to generate connection information. Then, the distributed n-L pieces of distributed information W₀... W_n-L-1 are transmitted to a first node group, and the generated L pieces of connection information are transmitted to a second node group.;COPYRIGHT: (C)2009,JPO&INPIT