Patents by Inventor Yuki KASEDA

Yuki KASEDA 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).

  • Re-encryption system, re-encryption apparatus, and program
    Patent number: 9635001
    Abstract: A re-encryption system according to this embodiment includes a file sharing apparatus and a re-encryption apparatus. Upon receiving a file request from the client apparatus, the file sharing apparatus acquires a first encrypted file based on the file request, and transmits a re-encryption request including the first encrypted file to the re-encryption apparatus. The re-encryption apparatus re-encrypts the first encrypted file included in the re-encryption request to the second encrypted file based on the re-encryption key, and transmits the second encrypted file to the file sharing apparatus. The file sharing apparatus transmits the second encrypted file to the client apparatus. The client apparatus obtains the file by decrypting the second encrypted file based on a private key corresponding to the public key of the member.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: April 25, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Yuki Kaseda, Takuya Yoshida, Yoshihiro Fujii, Shingo Abe, Masataka Yamada
  • RE-ENCRYPTION SYSTEM, RE-ENCRYPTION APPARATUS, AND PROGRAM
    Publication number: 20160119292
    Abstract: A re-encryption system according to this embodiment includes a file sharing apparatus and a re-encryption apparatus. Upon receiving a file request from the client apparatus, the file sharing apparatus acquires a first encrypted file based on the file request, and transmits a re-encryption request including the first encrypted file to the re-encryption apparatus. The re-encryption apparatus re-encrypts the first encrypted file included in the re-encryption request to the second encrypted file based on the re-encryption key, and transmits the second encrypted file to the file sharing apparatus. The file sharing apparatus transmits the second encrypted file to the client apparatus. The client apparatus obtains the file by decrypting the second encrypted file based on a private key corresponding to the public key of the member.
    Type: Application
    Filed: May 9, 2014
    Publication date: April 28, 2016
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Yuki KASEDA, Takuya YOSHIDA, Yoshihiro FUJII, Shingo ABE, Masataka YAMADA