Ryutaroh MATSUMOTO


On Asymptotically Good Ramp Secret Sharing Schemes
Olav GEIL Stefano MARTIN Umberto MARTÍNEZ-PEÑAS Ryutaroh MATSUMOTO Diego RUANO 
Publication:   
Publication Date: 2017/12/01
Vol. E100-A  No. 12  pp. 2699-2708
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Cryptography and Information Security
Keyword: 
algebraic geometric codesgeneralized Hamming weightsrelative generalized Hamming weightssecret sharing
 Summary | Full Text:PDF(354.1KB)

Quantum Stabilizer Codes Can Realize Access Structures Impossible by Classical Secret Sharing
Ryutaroh MATSUMOTO 
Publication:   
Publication Date: 2017/12/01
Vol. E100-A  No. 12  pp. 2738-2739
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Cryptography and Information Security
Keyword: 
secret sharingaccess structurequantum error correction
 Summary | Full Text:PDF(134.3KB)

Quantum Optimal Multiple Assignment Scheme for Realizing General Access Structure of Secret Sharing
Ryutaroh MATSUMOTO 
Publication:   
Publication Date: 2017/02/01
Vol. E100-A  No. 2  pp. 726-728
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
quantum secret sharingmultiple assignment schemeaccess structure
 Summary | Full Text:PDF(94.3KB)

Strong Security of the Strongly Multiplicative Ramp Secret Sharing Based on Algebraic Curves
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/07/01
Vol. E98-A  No. 7  pp. 1576-1578
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
ramp secret sharingmultiplicative secret sharingstrong securityalgebraic geometry code
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Parametric Forms of the Achievable Rate Region for Source Coding with a Helper
Tetsunao MATSUTA Tomohiko UYEMATSU Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/12/01
Vol. E95-A  No. 12  pp. 2493-2497
Type of Manuscript:  LETTER
Category: Information Theory
Keyword: 
achievable rate regioncorrelated sourcesdata compressionfixed-length codingsource coding with a helper
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Secret Sharing Schemes Based on Linear Codes Can Be Precisely Characterized by the Relative Generalized Hamming Weight
Jun KURIHARA Tomohiko UYEMATSU Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/11/01
Vol. E95-A  No. 11  pp. 2067-2075
Type of Manuscript:  PAPER
Category: Information Theory
Keyword: 
secret sharing schemelinear coderelative generalized Hamming weightrelative dimension/length profile
 Summary | Full Text:PDF(342.7KB)

Vulnerability of MRD-Code-based Universal Secure Network Coding against Stronger Eavesdroppers
Eitaro SHIOJI Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 2026-2033
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Cryptography and Information Security
Keyword: 
network codingsecure network codinglinear network codinguniversal securityMRD code
 Summary | Full Text:PDF(336.8KB)

Universal Slepian-Wolf Source Codes Using Low-Density Parity-Check Matrices
Tetsunao MATSUTA Tomohiko UYEMATSU Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 1878-1888
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Source Coding
Keyword: 
data compressionfixed-length codinglinear codeslow-density parity-check matricesSlepian-Wolf source coding
 Summary | Full Text:PDF(415.6KB)

Strongly Secure Privacy Amplification Cannot Be Obtained by Encoder of Slepian-Wolf Code
Shun WATANABE Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/09/01
Vol. E93-A  No. 9  pp. 1650-1659
Type of Manuscript:  PAPER
Category: Information Theory
Keyword: 
privacy amplificationsecret key agreementSlepian-Wolf codingstrong securityvariational distanceweak security
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Decodability of Network Coding with Time-Varying Delay and No Buffering
Terumasa TATENO Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/08/01
Vol. E92-A  No. 8  pp. 2141-2145
Type of Manuscript:  LETTER
Category: Information Theory
Keyword: 
time-varying delaynetwork codinglinear codingmulticast
 Summary | Full Text:PDF(103.2KB)

Secret Key Agreement by Soft-Decision of Signals in Gaussian Maurer's Model
Masashi NAITO Shun WATANABE Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/02/01
Vol. E92-A  No. 2  pp. 525-534
Type of Manuscript:  PAPER
Category: Information Theory
Keyword: 
advantage distillationAWGNinformation theoretic securitykey agreementprivacy amplificationpublic discussion
 Summary | Full Text:PDF(354.9KB)

Key Rate Available from Mismatched Measurements in the BB84 Protocol and the Uncertainty Principle
Ryutaroh MATSUMOTO Shun WATANABE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2870-2873
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Information Theory
Keyword: 
BB84mismatched measurementquantum key distribution
 Summary | Full Text:PDF(83.1KB)

Construction Algorithm for Network Error-Correcting Codes Attaining the Singleton Bound
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/09/01
Vol. E90-A  No. 9  pp. 1729-1735
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
error correctionMDS codenetwork codingrandom network codingSingleton bound
 Summary | Full Text:PDF(163.8KB)

Efficient Secret Sharing Schemes Based on Authorized Subsets
Kouya TOCHIKUBO Tomohiko UYEMATSU Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1  pp. 322-326
Type of Manuscript:  Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
(k,n)-threshold schemegeneral access structureverifiable secret sharing scheme
 Summary | Full Text:PDF(92.3KB)

Two Methods for Decreasing the Computational Complexity of the MIMO ML Decoder
Takayuki FUKATANI Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2571-2576
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Communication Theory
Keyword: 
MIMO fading channelmaximum likelihood detectionsphere decoderlattice
 Summary | Full Text:PDF(327.5KB)

Secret Key Capacity for Ergodic Correlated Sources
Kouya TOCHIKUBO Tomohiko UYEMATSU Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1651-1654
Type of Manuscript:  LETTER
Category: Information Theory
Keyword: 
secret key-capacitycommon randomnessergodic source
 Summary | Full Text:PDF(89.8KB)

Fast Encoding of Algebraic Geometry Codes
Ryutaroh MATSUMOTO Masakuni OISHI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/10/01
Vol. E84-A  No. 10  pp. 2514-2517
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
encoderone-point algebraic geometry code
 Summary | Full Text:PDF(158KB)

Constructing Quantum Error-Correcting Codes for pm-State Systems from Classical Error-Correcting Codes
Ryutaroh MATSUMOTO Tomohiko UYEMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/10/25
Vol. E83-A  No. 10  pp. 1878-1883
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
quantum codesstabilizer codesadditive codesself-orthogonal codes
 Summary | Full Text:PDF(376.9KB)

On the Feng-Rao Bound for the L-construction of Algebraic Geometry Codes
Ryutaroh MATSUMOTO Shinji MIURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/05/25
Vol. E83-A  No. 5  pp. 923-926
Type of Manuscript:  LETTER
Category: Information Theory
Keyword: 
algebraic geometry codeminimum distancedecodingL-construction
 Summary | Full Text:PDF(181.8KB)

Miura's Generalization of One-Point AG Codes is Equivalent to Hφholdt, van Lint and Pellikaan's Generalization
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/10/25
Vol. E82-A  No. 10  pp. 2007-2010
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
evaluation codeone-point AG codes
 Summary | Full Text:PDF(225.6KB)

Constructing Algebraic Geometry Codes on the Normalization of a Singular Cab Curve
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/09/25
Vol. E82-A  No. 9  pp. 1981-1986
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
one-point algebraic geometry codeCab curveevaluation codenormalizationGrobner basis
 Summary | Full Text:PDF(252.6KB)

Linear Codes on Nonsingular Curves are Better than Those on Singular Curves
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/04/25
Vol. E82-A  No. 4  pp. 665-670
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
algebraic-geometry codesingular curvenormalization
 Summary | Full Text:PDF(153.3KB)

Using Cab Curves in the Function Field Sieve
Ryutaroh MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 551-552
Type of Manuscript:  LETTER
Category: Image Theory
Keyword: 
discrete logarithm problemfunction field sieveCab curve
 Summary | Full Text:PDF(78.6KB)

Simple Estimation for the Dimension of Subfield Subcodes of AG Codes
Tomoharu SHIBUYA Ryutaroh MATSUMOTO Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/11/25
Vol. E80-A  No. 11  pp. 2058-2065
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
algebraic geometric codedimension of subfield subcodeclass of algebraic curve Cab
 Summary | Full Text:PDF(538.9KB)

An Improved Bound for the Dimension of Subfield Subcodes
Tomoharu SHIBUYA Ryutaroh MATSUMOTO Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/05/25
Vol. E80-A  No. 5  pp. 876-880
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
dimension of subfield subcodeBCH codealgebraic geometric code
 Summary | Full Text:PDF(301.5KB)