Cryptographic system, encrypted data conversion apparatus, and computer readable medium

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12261951
APP PUB NO 20220303132A1
SERIAL NO

17835417

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Importance

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Abstract

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A deduplication system (100) includes encryption apparatuses (400), a conversion key generation apparatus (500), a tag conversion apparatus (600), and a match determination apparatus (700). The encryption apparatuses (400) each generate encryption tag (ETag) using an encryption key (ek) and plaintext (M). The conversion key generation apparatus (500) generates a conversion key (ck) using the encryption key (ek) and a conversion key generation key (tk). The tag conversion apparatus (600) converts an encryption tag (ETag) for which the same plaintext (M) has been used into an encryption tag (T) that takes the same value regardless of a value of the encryption key (ek) used for the encryption tag (ETag) by applying the conversion key (ck) to the encryption tag (ETag). The match determination apparatus (700) determines whether the values of two encryption tags (T) match.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI ELECTRIC CORPORATIONTOKYO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawai, Yutaka Tokyo, JP 87 383

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