Patents by Inventor Yukiyasu Tsundo

Yukiyasu Tsundo 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).

  • CRYPTOGRAPHIC METHOD, CRYPTOGRAPHIC DEVICE, AND CRYPTOGRAPHIC PROGRAM
    Publication number: 20140037088
    Abstract: K-sequence-data randomizing processing is performed a predetermined number of times. One round of the processing includes steps of: performing conversion processing on k pieces (k is an even number of 6 or more) of n-bit sequence data obtained by dividing n×k bit block data so that i-th sequence data and (i+1)th sequence data (i=1, 2, . . . , k?1) interacts with each other and outputting k pieces of data W1, W2, . . . , Wk; and permutating the data W1, W2, . . . , Wk based on a predetermined rule.
    Type: Application
    Filed: April 11, 2012
    Publication date: February 6, 2014
    Applicant: NEC CORPORATION
    Inventors: Tomoyasu Suzaki, Yukiyasu Tsundo