Hiroki Koga

Publication Activity (10 Years)

Years Active: 1997-2023
Publications (10 Years): 18

Top Topics

Visual Cryptography Scheme

Top Venues

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.

Publications

Hiroki Koga
Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106 (3) (2023)
Hiroki Koga
Construction of the Visual Cryptography Scheme with the Maximum Relative Difference under a Strong General Access Structure. ISIT (2022)
Hiroki Koga
Coding Theorems on Digital Fingerprinting Coding under Informed and Uninformed Setups. ITW (2021)
D. Saito, T. Kobayashi, Hiroki Koga, Nicolo Ronchi, K. Banerjee, Y. Shuto, Jun Okuno, K. Konishi, Luca Di Piazza, A. Mallik, Jan Van Houdt, M. Tsukamoto, K. Ohkuri, Taku Umebayashi, Takayuki Ezaki
Analog In-memory Computing in FeFET-based 1T1R Array for Edge AI Applications. VLSI Circuits (2021)
Kyohei Sekine, Hiroki Koga
Optimal Basis Matrices of a Visual Cryptography Scheme with Meaningful Shares and Analysis of Its Security. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2021)
Hiroki Koga
Coding Theorems on the Simple Capacity for Digital Fingerprinting Codes. ISITA (2020)
Ryo Okamura, Hiroki Koga
New Constructions of an Evolving 2-Threshold Scheme Based on Binary or D-ary Prefix Codes. ISITA (2020)
Kyohei Sekine, Hiroki Koga
Optimal Basis Matrices of a Visual Cryptography Scheme with Meaningful Shares and Analysis of Its Security. ISITA (2020)
Sayaka Doi, Hiroki Koga, Tomonori Seki, Yutaro Okuno
Novel Proximity Sensor for Realizing Tactile Sense in Suction Cups. ICRA (2020)
Yohei Okawa, Hiroki Koga
An Ideal Secret Sharing Scheme Realizing an Access Structure Based on a Finite Projective Plane of Order 3. ISIT (2020)
Hiroki Koga
A Lower Bound on the Joint Capacity of Digital Fingerprinting Codes Using Score Functions Based on Log-Likelihood Ratio. ISIT (2018)
Koutaro Okada, Hiroki Koga
A Construction of the (4, n)-Threshold Visual Cryptography Scheme Using a 3-Design. ISITA (2018)
Tsutomu Haruta, Tsutomu Nakajima, Jun Hashizume, Taku Umebayashi, Hiroshi Takahashi, Kazuo Taniguchi, Masami Kuroda, Hiroshi Sumihiro, Koji Enoki, Takatsugu Yamasaki, Katsuya Ikezawa, Atsushi Kitahara, Masao Zen, Masafumi Oyama, Hiroki Koga, Hidenobu Tsugawa, Tomoharu Ogita, Takashi Nagano, Satoshi Takano, Tetsuo Nomoto
4.6 A 1/2.3inch 20Mpixel 3-layer stacked CMOS Image Sensor with DRAM. ISSCC (2017)
Koutaro Okada, Hiroki Koga
A construction of the progressive (3, n)-threshold visual cryptography using a BIBD and analysis of its optimality. ITW (2017)
Jun Muramatsu, Hiroki Koga
Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2017)
Hiroki Koga, Kaoru Itabashi
A Higher Order Analysis of the Joint Capacity of Digital Fingerprinting Codes against the Interleaving Attack. IH&MMSec (2016)
Shota Kamiya, Hiroki Koga
New fundamental properties on a secret-key cryptosystem under guessing secrecy criteria. ISITA (2016)
Hiroki Koga
On a partition of a finite set and its relationships to encoding tasks and the Rényi entropy. ISIT (2015)
Hiroki Koga
On the capacity and the zero-error capacity of k-resilient AND anti-collusion codes. ITW (2014)
Hiroki Koga, Shuntaro Honjo
A secret sharing scheme based on a systematic Reed-Solomon code and analysis of its security for a general class of sources. ISIT (2014)
Hiroki Koga, Hiroyuki Goto, Eishi Chiba
Resolution of resource conflicts in the CCPM framework using a local search method. IEEM (2014)
Takemasa Yokoyama, Yasuki Noguchi, Hiroki Koga, Ryosuke Tachibana, Jun Saiki, Ryusuke Kakigi, Shinichi Kita
Multiple neural mechanisms for coloring words in synesthesia. NeuroImage 94 (2014)
Mitsuharu Arimura, Hiroki Koga, Ken-ichi Iwata
Redundancy-Optimal FF Codes for a General Source and Its Relationships to the Rate-Optimal FF Codes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2013)
Hiroki Koga
Characterization of the smooth Rényi Entropy Using Majorization. ITW (2013)
Mitsuharu Arimura, Hiroki Koga, Ken-ichi Iwata
A Characterization of Optimal FF Coding Rate Using a New Optimistically Optimal Code. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2013)
Hiroki Koga
On the Achievable Rate Region in the Optimistic Sense for Separate Coding of Two Correlated General Sources. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2012)
Mitsugu Iwamoto, Hiroki Koga, Hirosuke Yamamoto
Coding Theorems for a (2, 2)-Threshold Scheme With Detectability of Impersonation Attacks. IEEE Trans. Inf. Theory 58 (9) (2012)
Hiroki Koga, Kazuya Koyano
On the role of mutual infomation between the shares in a robust (k, n)-threshold scheme. ISITA (2012)
Hiroki Koga
Four Limits in Probability and Their Roles in Source Coding. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (11) (2011)
Hiroki Koga, Takeru Ishihara
)-threshold visual secret sharing schemes for color images. Des. Codes Cryptogr. 61 (2) (2011)
Hiroki Koga, Yusuke Minami
A Digital Fingerprinting Code Based on a Projective Plane and Its Identifiability of All Malicious Users. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2011)
Hiroki Koga, Mitsuharu Arimura, Ken-ichi Iwata
Coding theorems on the worst-case redundancy of fixed-length coding for a general source. ISIT (2011)
Hiroyuki Ishii, Hiroki Koga, Yuichi Obokawa, Jorge Solis, Atsuo Takanishi, Akitoshi Katsumata
Path generator control system and virtual compliance calculator for maxillofacial massage robots. Int. J. Comput. Assist. Radiol. Surg. 5 (1) (2010)
Hiroki Koga
A simple secret sharing scheme using a key and its security against substitution of shares. ISIT (2010)
Mitsugu Iwamoto, Hiroki Koga, Hirosuke Yamamoto
Coding Theorems for Cheating-Detectable Secret Sharing Schemes with Two Shares CoRR (2010)
Hiroki Koga
Two generalizations of a coding theorem for a (2, 2)-threshold scheme with a cheater. ISITA (2010)
Mitsugu Iwamoto, Hirosuke Yamamoto, Hiroki Koga
A coding theorem for cheating-detectable (2, 2)-threshold blockwise secret sharing schemes. ISIT (2009)
Hiroyuki Ishii, Hiroki Koga, Yuichi Obokawa, Jorge Solis, Atsuo Takanishi, Akitoshi Katsumata
Development and Experimental Evaluation of Oral Rehabilitation Robot that Provides Maxillofacial Massage to Patients with Oral Disorders. Int. J. Robotics Res. 28 (9) (2009)
Hiroki Koga
Coding Theorems on the Threshold Scheme for a General Source. IEEE Trans. Inf. Theory 54 (6) (2008)
Hiroki Koga
Source Coding Using Families of Universal Hash Functions. IEEE Trans. Inf. Theory 53 (9) (2007)
Hiroki Koga, Isao Nakano
Coding Theorems for General Stegosystems. ISIT (2007)
Hiroki Koga, Etsuyo Ueda
Proposal of an Asymptotically Contrast-Ideal (t, n)- Threshold Visual Secret Sharing Scheme. ISIT (2006)
Hiroki Koga, Etsuyo Ueda
)-Threshold Visual Secret Sharing Scheme with Perfect Reconstruction of Black Pixels. Des. Codes Cryptogr. 40 (1) (2006)
Hiroki Koga, Hirosuke Yamamoto
Asymptotic properties on codeword lengths of an optimal FV code for general sources. IEEE Trans. Inf. Theory 51 (4) (2005)
Hiroki Koga
Coding theorems on the threshold scheme for a general source. ICITS (2005)
Hiroki Koga, Naoki Sato
On an upper bound of the secrecy capacity for a general wiretap channel. ISIT (2005)
Hiroki Koga
Source coding using a class of universal hash functions. ISIT (2004)
Takeru Ishihara, Hiroki Koga
A Visual Secret Sharing Scheme for Color Images Based on Meanvalue-Color Mixing. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2003)
Hiroki Koga
A Constraint-based Grammar of Case : To Correctly Predict Case Phrases Occurring without Their Head Verb. PACLIC (2003)
Jun Muramatsu, Hiroki Koga, Takafumi Mukouchi
On the Problem of Generating Mutually Independent Random Sequences. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (5) (2003)
Hiroki Koga
A General Formula of the (t, n)-Threshold Visual Secret Sharing Scheme. ASIACRYPT (2002)
Takeru Ishihara, Hiroki Koga
New Constructions of the Lattice-Based Visual Secret Sharing Scheme Using Mixture of Colors. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2002)
Suguru Arimoto, Hiroki Koga, Tomohide Naniwa
Proposal of the-law-of-inertia (friction/gravity-free) robots. ICRA (1997)