T
Takeshi Shimoyama
Researcher at Fujitsu
Publications - 119
Citations - 1470
Takeshi Shimoyama is an academic researcher from Fujitsu. The author has contributed to research in topics: Encryption & Block cipher. The author has an hindex of 19, co-authored 119 publications receiving 1396 citations.
Papers
More filters
Journal ArticleDOI
Localization and Primary Decomposition of Polynomial Ideals
TL;DR: A new method for primary decomposition of a polynomial ideal, not necessarily zero-dimensional, is proposed and a detailed study for its practical implementation is reported on.
Proceedings ArticleDOI
Secure pattern matching using somewhat homomorphic encryption
TL;DR: This paper makes use of the somewhat homomorphic encryption scheme presented by Lauter, Naehrig and Vaikuntanathan (ACM CCSW 2011), which supports a limited number of both additions and multiplications on encrypted data and proposes a new packing method suitable for an efficient computation of multiple Hamming distance values onencrypted data.
Book ChapterDOI
Packed homomorphic encryption based on ideal lattices and its application to biometrics
TL;DR: This paper proposes an efficient method to compute the Hamming distance on encrypted data using the homomorphic encryption based on ideal lattices, and proposes a privacy-preserving biometric authentication protocol using this method, and compares it with related protocols.
Book ChapterDOI
Quadratic Relation of S-box and Its Application to the Linear Attack of Full Round DES
TL;DR: An improved algorithm is described that can reduce the number of required plaintexts and ciphertexts pairs to 25/34 (73.5 %) of those number of pairs required in the linear attack by Matsui.
Book ChapterDOI
Practical Packing Method in Somewhat Homomorphic Encryption
TL;DR: This paper focuses on the scheme proposed by Lauter, Naehrig and Vaikuntanathan (ACM CCSW 2011), and presents two types of packed ciphertexts based on their packing technique, giving practical size and performance for wider computations such as statistical analysis and distances.