Sending messages by oblivious transfer

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United States of America Patent

PATENT NO 9571271
APP PUB NO 20150143102A1
SERIAL NO

14605092

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A system includes a server connectable to a client, the server configured to allow the client to acquire a message of an index designated by the client among N messages held by the server where N is an integer of two or more. The server includes a classification unit configured to classify the N messages into M classified messages by contents of the messages; a message encryption unit configured to encrypt each of the M classified messages; a message provision unit configured to provide the M encrypted classified messages to the client; and a key sending unit configured to send the client, by oblivious transfer, a message key for decrypting the classified message corresponding to the message of the index designated by the client.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tateishi, Takaaki Tokyo, JP 85 818
Watanabe, Yuji Tokyo, JP 191 1746

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