TOORU NAKANISHI
Last Updated :2024/07/03
- Affiliations, Positions
- Graduate School of Advanced Science and Engineering, Professor
- Web Site
- E-mail
- t-nakanishi
hiroshima-u.ac.jp
- Self-introduction
- My research interests include cryptography and information security, particularly privacy-enhancing technology.
Basic Information
Major Professional Backgrounds
- 1998/04/01, 2003/11/30, Okayama University, Faculty of Engineering, Research Associate
- 2003/12/01, 2005/03/31, Okayama University, Faculty of Engineering, Lecturer
- 2005/04/01, 2006/06/30, Okayama University, Lecturer
- 2006/07/01, 2014/03/31, Okayama University, Associate Professor
- 2014/04/01, 2020/03/31, Hiroshima University, Institute of Engineering, Professor
- 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Professor
Academic Degrees
- Doctor of Engineering, Osaka University
- Master of Engineering, Osaka University
Educational Activity
- [Bachelor Degree Program] School of Informatics and Data Science : Department of Informatics and Data Science : Computer Science Program
- [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Informatics and Data Science Program
- [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Informatics and Data Science Program
Research Fields
- Informatics;Computing Technologies;Information security
Affiliated Academic Societies
- Institute of Electronics, Information and Communication Engineers (IEICE)
- Information Processing Society of Japan (IPSJ)
Educational Activity
Course in Charge
- 2024, Undergraduate Education, 2Term, Information Theory
- 2024, Undergraduate Education, 1Term, Theory of Computing
- 2024, Undergraduate Education, 2Term, Information Society and Security
- 2024, Undergraduate Education, 1Term, Informatics Seminar I
- 2024, Undergraduate Education, 2Term, Informatics Seminar II
- 2024, Undergraduate Education, Second Semester, Graduation Thesis
- 2024, Graduate Education (Master's Program) , 1Term, Special Exercises on Informatics and Data Science A
- 2024, Graduate Education (Master's Program) , 2Term, Special Exercises on Informatics and Data Science A
- 2024, Graduate Education (Master's Program) , 3Term, Special Exercises on Informatics and Data Science B
- 2024, Graduate Education (Master's Program) , 4Term, Special Exercises on Informatics and Data Science B
- 2024, Graduate Education (Master's Program) , Academic Year, Special Study on Informatics and Data Science
- 2024, Graduate Education (Master's Program) , 4Term, Cryptography
- 2024, Graduate Education (Doctoral Program) , Academic Year, Special Study on Informatics and Data Science
Research Activities
Academic Papers
- Short DL-based Blacklistable Ring Signatures from DualRing, Proceedings - 2022 10th International Symposium on Computing and Networking, CANDAR 2022, 137-143, 202211
- A File Sharing Method Using a Delay Tolerant Network in Daily Life, IEEE Region 10 Annual International Conference, Proceedings/TENCON, 202211
- An Efficient Anonymous Reputation System for Crowdsensing, Journal of Information Processing, 30, 694-705, 202210
- An Efficient Revocable Delegatable Anonymous Credential System Using an Accumulator, Journal of Information Processing, 30, 706-717, 202210
- Efficient Zero-Knowledge Proofs of Graph Signature for Connectivity and Isolation Using Bilinear-Map Accumulator, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E105A(3), 389-403, 202203
- Reducing Revocation Lists in CS-Based Revocable Group Signature Scheme Using Vector Commitment, Proc. CANDAR2021, 175-181, 202111
- A Strongly Unlinkable Group Signature Scheme with Matching-Based Verifier-Local Revocation for Privacy-Enhancing Crowdsensing, Proc. CANDAR2021, 141-147, 202111
- A New Structure of 2-State Number-Conserving Cellular Automata, IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, E104D(5), 673-678, 202105
- Efficient Zero-Knowledge Proofs of Graph Signature for Connectivity and Isolation Using Bilinear-Map Accumulator, Proc. 7th ACM Workshop on ASIA Public-Key Cryptography (APKC2020), 9-18, 20201005
- An Anonymous Credential System with Constant-Size Attribute Proofs for CNF Formulas with Negations, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E103A(12), 1381-1392, 202012
- An Accumulator-Based Revocation in Delegatable Anonymous Credentials, Proc. 7th International Workshop on Information and Communication Security (WICS'21), 314-320, 202012
- Efficient blacklistable anonymous credential system with reputation using a pairing-based accumulator, IET INFORMATION SECURITY, 14(6), 613-624, 202011
- Speeding Up Revocable Group Signature with Compact Revocation List Using Vector Commitments, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E102A(12), 1676-1687, 201912
- ★, An Efficient Blacklistable Anonymous Credentials without TTP of Tracing Authority Using Pairing-Based Accumulator, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E102A(12), 1968-1979, 201912
- An Efficient Anonymous Reputation System for Crowd Sensing, Proc. 6th International Workshop on Information and Communication Security (WICS 2019), 374-380, 201912
- Efficiency Improvement in Group Signature Scheme with Probabilistic Revocation, Journal of Information Processing, 27, 508-516, 201912
- An Anonymous Credential System with Constant-Size Attribute Proofs for CNF Formulas with Negations, Proc. 14th International Workshop on Security (IWSEC 2019), LNCS 11689, 89-106, 201908
- Speeding Up Revocable Group Signature with Compact Revocation List Using Vector Commitments, Sixth International Symposium on Computing and Networking (CANDAR 2018), 160-166, 201811
- Efficiency Improvement in Group Signature Scheme with Probabilistic Revocation, 2018 International Symposium on Information Theory and Its Applications (ISITA 2018), 80-84, 201810
- An Efficient Blacklistable Anonymous Credential System with Reputation Using Pairing-based Accumulator, 17th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom-18), 1140-1148, 201808
- Accumulator for Monotone Formulas and its Application to Anonymous Credential System, Journal of Information Processing, 25, 949-961, 201712
- Implementation of Revocable Group Signatures with Compact Revocation List Using Vector Commitments, CANDAR-WICS 2017, 489-495, 201711
- Designated-Senders Public-Key Searchable Encryption Secure against Keyword Guessing Attacks, CANDAR-WICS 2017, 496-502, 201711
- Hierarchical Motion Representation of 2-State Number Conserving Cellular Automata, CANDAR-AFCA 2017, 194-199, 201711
- Revocable Group Signatures with Compact Revocation List Using Vector Commitments, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E100A(8), 1672-1682, 201708
- An Efficient Blacklistable Anonymous Credentials without TTPs Using Pairing-Based Accumulator, AINA2017, 780-786, 201703
- A Secure Data Exchange System in Wireless Delay Tolerant Network Using Attribute-Based Encryption, Journal of Information Processing, 25, 234-243, 201702
- Implementation of a Revocable Group Signature Scheme with Compact Revocation List Using Accumulator, Proc. CANDAR2016-WICS, 610-615, 201611
- Revocable Group Signatures with Compact Revocation List Using Vector Commitments, Proc. 17th World Conference on Information Security Applications (WISA 2016), LNCS 10144, 245-257, 201608
- Reduction of Certificates in an Anonymous Credential System with Proofs for Monotone Formulas on Attributes, Proc. 2016 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW), 201605
- An implementation of Secure Data Exchange System with Multi-hop Routing in Wireless Delay Tolerant Network Using Attribute-Based Encryption, Proc. CANDAR, 2nd International Workshop on Information and Communication Security (WICS 2015), 536-542, 201512
- Anonymous Credential System with Efficient Proofs for Monotone Formulas on Attributes, Proc. 10th International Workshop on Security (IWSEC 2015), LNCS 9241, 262-278, 201508
- Reduction of Authentication Time in an Anonymous Credential System with Proofs for Monotone Formulas on Attributes, Proc. 2015 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW 2015), 376-377, 201506
- Revocable Group Signatures with Compact Revocation List Using Accumulators, IEICE Trans. Fundamentals, E98-A(1), 117-131, 201501
- Extensions of Access-Point Aggregation Algorithm for Large-scale Wireless Local Area Networks, International Journal of Networking and Computing, 5(1), 200-222, 201501
- An Anonymous Reputation System with Reputation Secrecy for Manager, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E97A(12), 2325-2335, 201412
- Implementation of Anonymous Credential System with Efficient Proofs for Monotone Formulas on Attributes Excluding Restriction, Proc. of CANDAR’14, the 1st International Workshop on Information and Communication Security (WICS), 531-535, 201412
- An Implementation of Secure Data Exchange in Wireless Delay Tolerant Network Using Attribute-Based Encryption, Proc. of CANDAR’14, the 1st International Workshop on Information and Communication Security (WICS), 536-542, 201412
- An Implementation of Mobile Anonymous Attribute Authentication for Android Devices, Proc. of 2014 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW2014), 47-48, 201405
- A Proposal of Routing Algorithm under Practical Conditions for Wireless Internet-Access Mesh Networks, Proc. of 2014 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW2014), 27-28, 201405
- Efficient Proofs for CNF Formulas on Attributes in Pairing-Based Anonymous Credential System, IEICE Trans. Fundamentals, E96-A(12), 2422-2433, 201312
- Revocable Group Signatures with Compact Revocation List Using Accumulators, Proc. ICISC 2013, LNCS 8565, 435-451, 2013
- An Anonymous Reputation System with Reputation Secrecy for Manager, Proc. ICISC 2013, LNCS 8565(363), 363-378, 2013
- Efficient Proofs for CNF Formulas on Attributes in Pairing-Based Anonymous Credential System, ICISC2012, 495-509, 2012
- A Pairing-Based Anonymous Credential System with Efficient Attribute Proofs, Journal of Information Processing, 20(3), 774-784, 2012
- Efficient Proofs of Attributes in Pairing-Based Anonymous Credential System, PETS2011, 246-263, 2011
- Revocable Group Signature Schemes with Constant Costs for Signing and Verifying, IEICE Trans. Fundamentals, E93-A(1), 50-62, 2010
- Anonymous IEEE802.1X Authentication System Using Group Signatures, IPSJ Journal, 51(3), 691-704, 2010
- Forward-Secure Group Signatures From Pairings, IEICE Trans. Fundamentals, E93-A(11), 2007-2016, 2010
- ★, Revocable Group Signature Schemes with Constant Costs for Signing and Verifying, PKC2009, 463-480, 2009
- Forward-Secure Group Signatures From Pairings, Pairing2009, 171-186, 2009
- A Short Anonymously Revocable Group Signature Scheme from Decision Linear Assumption, ASIACCS2008, 337-340, 2008
- An Implementation of Anonymous IEEE802.1X Authentication with User Revocation, JWIS2008, 112-125, 2008
- Efficient Revocable Group Signature Schemes Using Primes, IPSJ Journal, 49(9), 110-121, 2008
- Verifier-Local Revocation Group Signature Schemes with Backward Unlinkability from Bilinear Maps, IEICE Trans. Fundamentals, E90-A(1), 65-74, 2007
- A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability, IEICE Trans. Fundamentals, E90-A(9), 1793-1802, 2007
- A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability, IWSEC2006, 17-32, 2006
- A Proposal of Anonymous IEEE802.1X Authentication Protocol for Wireless Networks, NPSec2006, 26-31, 2006
- Group Signature Schemes with Membership Revocation for Large Groups, IEICE Trans. Fundamentals, E89-A(5), 1275-1283, 2006
- Group Signature Schemes with Membership Revocation for Large Groups, ACISP2005, 443-454, 2005
- ★, Verifier-Local Revocation Group Signature Schemes with Backward Unlinkability from Bilinear Maps, ASIACRYPT2005, 533-548, 2005
- A Group Signature Scheme with Efficient Membership Revocation for Middle-Scale Groups, IEICE Trans. Fundamentals, Vol.E88-A, E88-A(5), 1224-1233, 2005
- An Efficient On-line Electronic Cash with Unlinkable Exact Payments, IEICE Trans. Fundamentals, E88-A(10), 2769-2777, 2005
- A Group Signature Scheme with Efficient Membership Revocation for Reasonable Groups, ACISP2004, 336-347, 2004
- An Efficient On-line Electronic Cash with Unlinkable Exact Payments, ISC2004, 367-378, 2004
- An Efficient Weighted Voting Protocol with Secret Weights, ISITA2004, 498-502, 2004
- Sealed-bid Auctions with Efficient Bids Using Secure Bit-slicing Conversion, IEICE Trans. Fundamentals, E87-A(10), 2533-2542, 2004
- Sealed-bid Auctions with Efficient Bids, ICISC2003, 230-244, 2003
- An Unlinkable Divisible Electronic Cash Using Secure Proxy Computation for DL One-way Function, Trans. IPS. Japan, 44(8), 2126-2136, 2003
- An Efficient Anonymous Survey for Attribute Statistics Using a Group Signature Scheme with Attribute Tracing, IEICE Trans. Fundamentals, E86-A(10), 2560-2568, 2003
- An Unlinkable Divisible Electronic Cash with User's Less Computations Using Active Trustees, ISITA2002, 547-550, 2002
- A Group Signature Scheme Committing the Group, ICICS2002, 73-84, 2002
- Anonymous Statistical Survey of Attributes Using Distributed Plaintext Membership Test, Trans. IPS. Japan, 43(8), 2414-2424, 2002
- An Efficiency Improvement on an Unlinkable Divisible Electronic Cash System, IEICE Trans. Fundamentals, E85-A(10), 2326-2335, 2002
- Anonymous Statistical Survey of Attributes, ACISP2001, 460-473, 2001
- Group Signature Scheme with Signature Tracing and Its Application to Electronic Coupon System, Trans. IPS. Japan, 42(8), 2030-2039, 2001
- Unlinkable Divisible Electronic Cash, ISW2000, 121-134, 2000
- An Anonymous Bidding Protocol without Any Reliable Center, Trans. IPS. Japan, 41(8), 2161-2169, 2000
- Unlinkable Electronic Coupon Protocol with Anonymity Control, ISW99, 37-46, 1999
- A Linkable Group Signature and Its Application to Secret Voting, Trans. IPS. Japan, 40(7), 3085-3096, 1999
External Funds
Acceptance Results of Competitive Funds
- KAKENHI(Grant-in-Aid for Scientific Research (C)), 2022, 2024
- KAKENHI, 2013, 2015
- KAKENHI, Proposal and Implementation of Revocable Group Signature Scheme with Scalability, 2010, 2012
- KAKENHI, 2016, 2018
- KAKENHI(Grant-in-Aid for Scientific Research (C)), 2019, 2021