Patents by Inventor Tomoyoshi Ohsawa

Tomoyoshi Ohsawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Encryption system, encryption method and encryption device
    Patent number: 10706163
    Abstract: An encoding unit encodes at least a part of items of a CSV file including a plurality of records having a plurality of items with a unit of items of respective records. A creation unit creates an encrypted dictionary in which an encoded dictionary having been used for the encoding is encrypted with a unit of dictionary. A transmission unit sends, according to a request for a part of records included in the data, encoded data including the encoded part of records and the encrypted dictionary to a requesting source. A requesting unit requests a part of records included in the CSV file. A decryption unit decrypts the encoded data received according to the request by using the encrypted dictionary.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: July 7, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Junki Hakamata, Masahiro Kataoka, Yukari Hakamata, Tomoyoshi Ohsawa
  • ENCRYPTION SYSTEM, ENCRYPTION METHOD AND ENCRYPTION DEVICE
    Publication number: 20180101687
    Abstract: An encoding unit encodes at least a part of items of a CSV file including a plurality of records having a plurality of items with a unit of items of respective records. A creation unit creates an encrypted dictionary in which an encoded dictionary having been used for the encoding is encrypted with a unit of dictionary. A transmission unit sends, according to a request for a part of records included in the data, encoded data including the encoded part of records and the encrypted dictionary to a requesting source. A requesting unit requests a part of records included in the CSV file. A decryption unit decrypts the encoded data received according to the request by using the encrypted dictionary.
    Type: Application
    Filed: September 27, 2017
    Publication date: April 12, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Junki HAKAMATA, Masahiro Kataoka, Yukari Hakamata, Tomoyoshi Ohsawa