Sending messages by oblivious transfer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8977841
APP PUB NO 20130159696A1
SERIAL NO

13706672

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

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.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tateishi, Takaaki Tokyo, JP 84 817
Watanabe, Yuji Tokyo, JP 191 1740

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Sep 10, 2026
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00