TOORU NAKANISHI

Last Updated :2023/01/05

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor
Web Site
E-mail
t-nakanishihiroshima-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

  1. 2022, Undergraduate Education, Intensive, Communication Engineering
  2. 2022, Undergraduate Education, 1Term, Theory of Computing
  3. 2022, Undergraduate Education, 2Term, Information Society and Security
  4. 2022, Graduate Education (Master's Program) , 1Term, Special Exercises on Informatics and Data Science A
  5. 2022, Graduate Education (Master's Program) , 2Term, Special Exercises on Informatics and Data Science A
  6. 2022, Graduate Education (Master's Program) , 3Term, Special Exercises on Informatics and Data Science B
  7. 2022, Graduate Education (Master's Program) , 4Term, Special Exercises on Informatics and Data Science B
  8. 2022, Graduate Education (Master's Program) , Academic Year, Special Study on Informatics and Data Science
  9. 2022, Graduate Education (Master's Program) , 4Term, Cryptography
  10. 2022, Graduate Education (Doctoral Program) , Academic Year, Special Study on Informatics and Data Science

Research Activities

Academic Papers

  1. An Anonymous Reputation System with Reputation Secrecy for Manager, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E97A(12), 2325-2335, 201412
  2. 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
  3. 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
  4. 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
  5. 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
  6. Efficient Proofs for CNF Formulas on Attributes in Pairing-Based Anonymous Credential System, IEICE Trans. Fundamentals, E96-A(12), 2422-2433, 201312
  7. Revocable Group Signatures with Compact Revocation List Using Accumulators, Proc. ICISC 2013, LNCS 8565, 435-451, 2013
  8. An Anonymous Reputation System with Reputation Secrecy for Manager, Proc. ICISC 2013, LNCS 8565(363), 363-378, 2013
  9. Revocable Group Signatures with Compact Revocation List Using Accumulators, IEICE Trans. Fundamentals, E98-A(1), 117-131, 201501
  10. Extensions of Access-Point Aggregation Algorithm for Large-scale Wireless Local Area Networks, International Journal of Networking and Computing, 5(1), 200-222, 201501
  11. 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
  12. Anonymous Credential System with Efficient Proofs for Monotone Formulas on Attributes, Proc. 10th International Workshop on Security (IWSEC 2015), LNCS 9241, 262-278, 201508
  13. 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
  14. A Secure Data Exchange System in Wireless Delay Tolerant Network Using Attribute-Based Encryption, Journal of Information Processing, 25, 234-243, 201702
  15. 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
  16. 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
  17. Implementation of a Revocable Group Signature Scheme with Compact Revocation List Using Accumulator, Proc. CANDAR2016-WICS, 610-615, 201611
  18. 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
  19. Accumulator for Monotone Formulas and its Application to Anonymous Credential System, Journal of Information Processing, 25, 949-961, 201712
  20. An Efficient Blacklistable Anonymous Credentials without TTPs Using Pairing-Based Accumulator, AINA2017, 780-786, 201703
  21. Implementation of Revocable Group Signatures with Compact Revocation List Using Vector Commitments, CANDAR-WICS 2017, 489-495, 201711
  22. Designated-Senders Public-Key Searchable Encryption Secure against Keyword Guessing Attacks, CANDAR-WICS 2017, 496-502, 201711
  23. Hierarchical Motion Representation of 2-State Number Conserving Cellular Automata, CANDAR-AFCA 2017, 194-199, 201711
  24. Unlinkable Electronic Coupon Protocol with Anonymity Control, ISW99, 37-46, 1999
  25. Unlinkable Divisible Electronic Cash, ISW2000, 121-134, 2000
  26. Anonymous Statistical Survey of Attributes, ACISP2001, 460-473, 2001
  27. An Unlinkable Divisible Electronic Cash with User's Less Computations Using Active Trustees, ISITA2002, 547-550, 2002
  28. A Group Signature Scheme Committing the Group, ICICS2002, 73-84, 2002
  29. Sealed-bid Auctions with Efficient Bids, ICISC2003, 230-244, 2003
  30. A Group Signature Scheme with Efficient Membership Revocation for Reasonable Groups, ACISP2004, 336-347, 2004
  31. An Efficient On-line Electronic Cash with Unlinkable Exact Payments, ISC2004, 367-378, 2004
  32. An Efficient Weighted Voting Protocol with Secret Weights, ISITA2004, 498-502, 2004
  33. Group Signature Schemes with Membership Revocation for Large Groups, ACISP2005, 443-454, 2005
  34. ★, Verifier-Local Revocation Group Signature Schemes with Backward Unlinkability from Bilinear Maps, ASIACRYPT2005, 533-548, 2005
  35. A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability, IWSEC2006, 17-32, 2006
  36. A Proposal of Anonymous IEEE802.1X Authentication Protocol for Wireless Networks, NPSec2006, 26-31, 2006
  37. A Short Anonymously Revocable Group Signature Scheme from Decision Linear Assumption, ASIACCS2008, 337-340, 2008
  38. An Implementation of Anonymous IEEE802.1X Authentication with User Revocation, JWIS2008, 112-125, 2008
  39. ★, Revocable Group Signature Schemes with Constant Costs for Signing and Verifying, PKC2009, 463-480, 2009
  40. Forward-Secure Group Signatures From Pairings, Pairing2009, 171-186, 2009
  41. Efficient Proofs of Attributes in Pairing-Based Anonymous Credential System, PETS2011, 246-263, 2011
  42. Efficient Proofs for CNF Formulas on Attributes in Pairing-Based Anonymous Credential System, ICISC2012, 495-509, 2012
  43. A Linkable Group Signature and Its Application to Secret Voting, Trans. IPS. Japan, 40(7), 3085-3096, 1999
  44. An Anonymous Bidding Protocol without Any Reliable Center, Trans. IPS. Japan, 41(8), 2161-2169, 2000
  45. Group Signature Scheme with Signature Tracing and Its Application to Electronic Coupon System, Trans. IPS. Japan, 42(8), 2030-2039, 2001
  46. Anonymous Statistical Survey of Attributes Using Distributed Plaintext Membership Test, Trans. IPS. Japan, 43(8), 2414-2424, 2002
  47. An Efficiency Improvement on an Unlinkable Divisible Electronic Cash System, IEICE Trans. Fundamentals, E85-A(10), 2326-2335, 2002
  48. An Unlinkable Divisible Electronic Cash Using Secure Proxy Computation for DL One-way Function, Trans. IPS. Japan, 44(8), 2126-2136, 2003
  49. An Efficient Anonymous Survey for Attribute Statistics Using a Group Signature Scheme with Attribute Tracing, IEICE Trans. Fundamentals, E86-A(10), 2560-2568, 2003
  50. Sealed-bid Auctions with Efficient Bids Using Secure Bit-slicing Conversion, IEICE Trans. Fundamentals, E87-A(10), 2533-2542, 2004
  51. A Group Signature Scheme with Efficient Membership Revocation for Middle-Scale Groups, IEICE Trans. Fundamentals, Vol.E88-A, E88-A(5), 1224-1233, 2005
  52. An Efficient On-line Electronic Cash with Unlinkable Exact Payments, IEICE Trans. Fundamentals, E88-A(10), 2769-2777, 2005
  53. Group Signature Schemes with Membership Revocation for Large Groups, IEICE Trans. Fundamentals, E89-A(5), 1275-1283, 2006
  54. Verifier-Local Revocation Group Signature Schemes with Backward Unlinkability from Bilinear Maps, IEICE Trans. Fundamentals, E90-A(1), 65-74, 2007
  55. A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability, IEICE Trans. Fundamentals, E90-A(9), 1793-1802, 2007
  56. Efficient Revocable Group Signature Schemes Using Primes, IPSJ Journal, 49(9), 110-121, 2008
  57. Revocable Group Signature Schemes with Constant Costs for Signing and Verifying, IEICE Trans. Fundamentals, E93-A(1), 50-62, 2010
  58. Anonymous IEEE802.1X Authentication System Using Group Signatures, IPSJ Journal, 51(3), 691-704, 2010
  59. Forward-Secure Group Signatures From Pairings, IEICE Trans. Fundamentals, E93-A(11), 2007-2016, 2010
  60. A Pairing-Based Anonymous Credential System with Efficient Attribute Proofs, Journal of Information Processing, 20(3), 774-784, 2012
  61. 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
  62. Efficiency Improvement in Group Signature Scheme with Probabilistic Revocation, 2018 International Symposium on Information Theory and Its Applications (ISITA 2018), 80-84, 201810
  63. Speeding Up Revocable Group Signature with Compact Revocation List Using Vector Commitments, Sixth International Symposium on Computing and Networking (CANDAR 2018), 160-166, 201811
  64. 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
  65. ★, 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
  66. 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
  67. An Efficient Anonymous Reputation System for Crowd Sensing, Proc. 6th International Workshop on Information and Communication Security (WICS 2019), 374-380, 201912
  68. Efficiency Improvement in Group Signature Scheme with Probabilistic Revocation, Journal of Information Processing, 27, 508-516, 201912
  69. Efficient blacklistable anonymous credential system with reputation using a pairing-based accumulator, IET INFORMATION SECURITY, 14(6), 613-624, 202011
  70. 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
  71. A New Structure of 2-State Number-Conserving Cellular Automata, IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, E104D(5), 673-678, 202105
  72. 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
  73. An Accumulator-Based Revocation in Delegatable Anonymous Credentials, Proc. 7th International Workshop on Information and Communication Security (WICS'21), 314-320, 202012
  74. Reducing Revocation Lists in CS-Based Revocable Group Signature Scheme Using Vector Commitment, Proc. CANDAR2021, 175-181, 202111
  75. A Strongly Unlinkable Group Signature Scheme with Matching-Based Verifier-Local Revocation for Privacy-Enhancing Crowdsensing, Proc. CANDAR2021, 141-147, 202111
  76. 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

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2013, 2015
  2. KAKENHI, Proposal and Implementation of Revocable Group Signature Scheme with Scalability, 2010, 2012
  3. KAKENHI, 2016, 2018
  4. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2019, 2021