Device, method and program for detecting positions of partial character strings

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United States of America Patent

PATENT NO 10291396
APP PUB NO 20170302442A1
SERIAL NO

15515650

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The positions in a text in which partial character strings in a pattern appear are efficiently detected. A partial-character-string position detecting device 1 takes inputs of a secret text [t] of a text t, a secrete text

of a pattern p, a secret text of a vector c, and a secret text of a matrix E and outputs a secret text of a matrix H. A first matrix generating part 20 generates a secret text of a matrix F, in which F[i][j]=E[i][j+i mod n+1] (where it is assumed that E[i][n]=¬c[i]). A second matrix generating part 30 generates a secret text of a matrix F′, in which F[i][j]=1 is set if c[i]=0 or if c[i]=1 and F[k][j]=1 for every k that is successively c[k]=1, otherwise F[i][j]=0 is set, where k=i, . . . , n−1. A third matrix generating part 40 computes =∧∧¬ to generate the secrete text .

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Patent Owner(s)

  • NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hamada, Koki Musashino, JP 80 272
Ikarashi, Dai Musashino, JP 82 235
Kiribuchi, Naoto Musashino, JP 8 23

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