Data management method, data management apparatus, and non-transitory computer readable medium

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United States of America Patent

PATENT NO 11442922
SERIAL NO

16566893

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Abstract

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A data management method includes: in a case where A denotes a set of symbols, A* denotes a set of all character strings composed of the symbols in A, L denotes a subset of A, and h(L) denotes a mapping performed on L with h that denotes a cryptographical hash function, regarding h: A*→A, multiple peers each hold an inverse mapping hL−1 of hL: L→h(L) that denotes a partial mapping of h, and in a case where at least one original data item M and an encrypted data item C encrypted from the original data item M are present, the encrypted data item C being held in hL−1, and correspondence between the original data item M and the encrypted data item C is to be validated, calculating a hash value h(M); decrypting the encrypted data item C with a hash value k; and comparing a result of the decrypting with the original data item M.

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Patent Owner(s)

  • FUJIFILM BUSINESS INNOVATION CORP.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Terao, Taro Kanagawa, JP 24 487

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