Eiji Okamoto

	2009
79		Jean-Luc Beuchat, Jérémie Detrey, Nicolas Estibals, Eiji Okamoto, Francisco Rodríguez-Henríquez: Hardware Accelerator for the Tate Pairing in Characteristic Three Based on Karatsuba-Ofman Multipliers. CHES 2009: 225-239
78		Chifumi Sato, Takeshi Okamoto, Eiji Okamoto: Strongly Unforgeable ID-Based Signatures without Random Oracles. ISPEC 2009: 35-46
77		Xun Yi, Raylin Tso, Eiji Okamoto: ID-Based Group Password-Authenticated Key Exchange. IWSEC 2009: 192-211
76		Anton Romanov, Eiji Okamoto: An Approach for Designing of Enterprise IT Landscapes to Perform Quantitave Information Security Risk Assessment. SECRYPT 2009: 313-318
75		Anton Romanov, Eiji Okamoto: A Framework for Building and Managing Secured ERP Landscape. Security and Management 2009: 490-495
74		Seiichi Matsuda, Naoki Kanayama, Florian Hess, Eiji Okamoto: Optimised Versions of the Ate and Twisted Ate Pairings. IEICE Transactions 92-A(7): 1660-1667 (2009)
	2008
73		Xun Yi, Mike Faulkner, Eiji Okamoto: Secure Wireless Sensor Networks. ARES 2008: 497-502
72		Atsushi Koide, Raylin Tso, Eiji Okamoto: A Sanitizing Signature Scheme with Indexing. EUC (2) 2008: 16-21
71		Atsushi Koide, Raylin Tso, Eiji Okamoto: Convertible Undeniable Partially Blind Signature from Bilinear Pairings. EUC (2) 2008: 77-82
70		Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto: An Efficient Countermeasure against Side Channel Attacks for Pairing Computation. ISPEC 2008: 290-303
69		Raylin Tso, Takeshi Okamoto, Eiji Okamoto: 1-out-of-. ISPEC 2008: 45-55
68		Jean-Luc Beuchat, Nicolas Brisebarre, Jérémie Detrey, Eiji Okamoto, Francisco Rodríguez-Henríquez: A Comparison between Hardware Accelerators for the Modified Tate Pairing over F2m and F3m. Pairing 2008: 297-315
67		Jean-Luc Beuchat, Nicolas Brisebarre, Jérémie Detrey, Eiji Okamoto, Masaaki Shirase, Tsuyoshi Takagi: Algorithms and Arithmetic Operators for Computing the etaT Pairing in Characteristic Three. IEEE Trans. Computers 57(11): 1454-1468 (2008)
66		Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto: Some Efficient Algorithms for the Final Exponentiation of etaT Pairing. IEICE Transactions 91-A(1): 221-228 (2008)
65		Sk. Md. Mizanur Rahman, Nidal Nasser, Atsuo Inomata, Takeshi Okamoto, Masahiro Mambo, Eiji Okamoto: Anonymous authentication and secure communication protocol for wireless mobile ad hoc networks. Security and Communication Networks 1(2): 179-189 (2008)
	2007
64		Tsuyoshi Takagi, Tatsuaki Okamoto, Eiji Okamoto, Takeshi Okamoto: Pairing-Based Cryptography - Pairing 2007, First International Conference, Tokyo, Japan, July 2-4, 2007, Proceedings Springer 2007
63		Jean-Luc Beuchat, Takanori Miyoshi, Yoshihito Oyama, Eiji Okamoto: Multiplication over Fpm on FPGA: A Survey. ARC 2007: 214-225
62		Raylin Tso, Chunxiang Gu, Takeshi Okamoto, Eiji Okamoto: Efficient ID-Based Digital Signatures with Message Recovery. CANS 2007: 47-59
61		Jean-Luc Beuchat, Nicolas Brisebarre, Jérémie Detrey, Eiji Okamoto: Arithmetic Operators for Pairing-Based Cryptography. CHES 2007: 239-255
60		Jean-Luc Beuchat, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto: An Algorithm for the nt Pairing Calculation in Characteristic Three and its Hardware Implementation. IEEE Symposium on Computer Arithmetic 2007: 97-104
59		Seiichi Matsuda, Naoki Kanayama, Florian Hess, Eiji Okamoto: Optimised Versions of the Ate and Twisted Ate Pairings. IMA Int. Conf. 2007: 302-312
58		Raylin Tso, Juan Manuel González Nieto, Takeshi Okamoto, Colin Boyd, Eiji Okamoto: Verifier-Key-Flexible Universal Designated-Verifier Signatures. IMA Int. Conf. 2007: 403-421
57		Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto: Some Efficient Algorithms for the Final Exponentiation of eta T Pairing. ISPEC 2007: 254-268
56		Raylin Tso, Takeshi Okamoto, Eiji Okamoto: An Improved Signcryption Scheme and Its Variation. ITNG 2007: 772-778
55		Raylin Tso, Takeshi Okamoto, Eiji Okamoto: ECDSA-Verifiable Signcryption Scheme with Signature Verification on the Signcrypted Message. Inscrypt 2007: 11-24
54		Jean-Luc Beuchat, Nicolas Brisebarre, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto: A Coprocessor for the Final Exponentiation of the eta T Pairing in Characteristic Three. WAIFI 2007: 25-39
53		Masaaki Shirase, Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto: Universal etaT Pairing Algorithm over Arbitrary Extension Degree. WISA 2007: 1-15
52		Lihua Wang, Eiji Okamoto, Ying Miao, Takeshi Okamoto, Hiroshi Doi: An ID-SP-M4M Scheme and Its Security Analysis. IEICE Transactions 90-A(1): 91-100 (2007)
	2006
51		Kun Peng, Colin Boyd, Ed Dawson, Eiji Okamoto: A Novel Range Test. ACISP 2006: 247-258
50		Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto: Efficient Implementation of Tate Pairing on a Mobile Phone Using Java. CIS 2006: 396-405
49		Sk. Md. Mizanur Rahman, Atsuo Inomata, Takeshi Okamoto, Masahiro Mambo, Eiji Okamoto: Anonymous Secure Communication in Wireless Mobile Ad-Hoc Networks. ICUCT 2006: 140-149
48		Sk. Md. Mizanur Rahman, Masahiro Mambo, Atsuo Inomata, Eiji Okamoto: An Anonymous On-Demand Position-Based Routing in Mobile Ad Hoc Networks. SAINT 2006: 300-306
47		Lihua Wang, Zhenfu Cao, Takeshi Okamoto, Ying Miao, Eiji Okamoto: Authorization-Limited Transformation-Free Proxy Cryptosystems and Their Security Analyses. IEICE Transactions 89-A(1): 106-114 (2006)
	2005
46		Ryôichi Sasaki, Sihan Qing, Eiji Okamoto, Hiroshi Yoshiura: Security and Privacy in the Age of Ubiquitous Computing, IFIP TC11 20th International Conference on Information Security (SEC 2005), May 30 - June 1, 2005, Chiba, Japan Springer 2005
45		Kun Peng, Ed Dawson, Juanma González Nieto, Eiji Okamoto, Javier Lopez: A Novel Method to Maintain Privacy in Mobile Agent Applications. CANS 2005: 247-260
44		Lihua Wang, Takeshi Okamoto, Tsuyoshi Takagi, Eiji Okamoto: Insider Impersonation-MIM Attack to Tripartite Key Agreement Scheme and an Efficient Protocol for Multiple Keys. CIS (2) 2005: 198-203
43		Raylin Tso, Takeshi Okamoto, Eiji Okamoto: Practical Strong Designated Verifier Signature Schemes Based on Double Discrete Logarithms. CISC 2005: 113-127
42		Raylin Tso, Takeshi Okamoto, Tsuyoshi Takagi, Eiji Okamoto: An id-based non-interactive tripartite key agreement protocol with K-resilience. Communications and Computer Networks 2005: 38-42
41		Takeshi Okamoto, Atsuo Inomata, Eiji Okamoto: A Proposal of Short Proxy Signature using Pairing. ITCC (1) 2005: 631-635
40		Takeshi Okamoto, Raylin Tso, Eiji Okamoto: One-Way and Two-Party Authenticated ID-Based Key Agreement Protocols Using Pairing. MDAI 2005: 122-133
39		Eiji Okamoto, Takeshi Okamoto: Cryptosystems Based on Elliptic Curve Pairing. MDAI 2005: 13-23
38		Lihua Wang, Eiji Okamoto, Ying Miao, Takeshi Okamoto, Hiroshi Doi: ID-Based Series-Parallel Multisignature Schemes for Multi-Messages from Bilinear Maps. WCC 2005: 291-303
37		Javier Lopez, José A. Montenegro, José Luis Vivas, Eiji Okamoto, Ed Dawson: Specification and design of advanced authentication and authorization services. Computer Standards & Interfaces 27(5): 467-478 (2005)
	2004
36		Javier Lopez, Sihan Qing, Eiji Okamoto: Information and Communications Security, 6th International Conference, ICICS 2004, Malaga, Spain, October 27-29, 2004, Proceedings Springer 2004
35		Masakazu Soshi, Mamoru Maekawa, Eiji Okamoto: The Dynamic-Typed Access Matrix Model and Decidability of the Safety Problem. IEICE Transactions 87-A(1): 190-203 (2004)
	2003
34		Juan Manuel González Nieto, Ed Dawson, Eiji Okamoto: Privacy and Trusted Computing. DEXA Workshops 2003: 383-388
33		Akira Kanaoka, Eiji Okamoto: Multivariate Statistical Analysis of Network Traffic for Intrusion Detection. DEXA Workshops 2003: 472-476
32		Raylin Tso, Ying Miao, Eiji Okamoto: A New Algorithm for Searching a Consistent Set of Shares in a Threshold Scheme with Cheaters. ICISC 2003: 377-385
31		Takeshi Okamoto, Hirofumi Katsuno, Eiji Okamoto: A Fast Signature Scheme Based on New On-line Computation. ISC 2003: 111-121
30		Selwyn Russell, Ed Dawson, Eiji Okamoto, Javier Lopez: Virtual certificates and synthetic certificates: new paradigms for improving public key validation. Computer Communications 26(16): 1826-1838 (2003)
	2002
29		Marie Henderson, Robert S. Coulter, Ed Dawson, Eiji Okamoto: Modelling Trust Structures for Public Key Infrastructures. ACISP 2002: 56-70
28		Masahiro Mambo, Eiji Okamoto, Yasushi Sengoku, Takashi Tanaka: Simple and Secure Mobile Access under the Flexible Organization Management. DEXA Workshops 2002: 456-462
27		Ed Dawson, Javier Lopez, José A. Montenegro, Eiji Okamoto: A New Design of Privilege Management Infrastructure for Organizations Using Outsourced PKI. ISC 2002: 136-149
	2000
26		Josef Pieprzyk, Eiji Okamoto, Jennifer Seberry: Information Security, Third International Workshop, ISW 2000, Wollongong, NSW, Australia, December 20-21, 2000, Proceedings Springer 2000
25		Bimal K. Roy, Eiji Okamoto: Progress in Cryptology - INDOCRYPT 2000, First International Conference in Cryptology in India, Calcutta, India, December 10-13, 2000, Proceedings Springer 2000
24		Hiroshi Doi, Masahiro Mambo, Eiji Okamoto: On the Security of the RSA-Based Multisignature Scheme for Various Group Structures. ACISP 2000: 352-367
23		Mike Burmester, Yvo Desmedt, Hiroshi Doi, Masahiro Mambo, Eiji Okamoto, Mitsuru Tada, Yuko Yoshifuji: A Structured ElGamal-Type Multisignature Scheme. Public Key Cryptography 2000: 466-483
22		Xun Yi, Chee Kheong Siew, Xiao Feng Wang, Eiji Okamoto: A Secure Agent-based Framework for Internet Trading in Mobile Computing Environments. Distributed and Parallel Databases 8(1): 85-117 (2000)
	1999
21		Kwok-Yan Lam, Eiji Okamoto, Chaoping Xing: Advances in Cryptology - ASIACRYPT '99, International Conference on the Theory and Applications of Cryptology and Information Security, Singapore, November 14-18, 1999, Proceedings Springer 1999
20		Xiao Feng Wang, Kwok-Yan Lam, Xun Yi, C. Q. Zhang, Eiji Okamoto: Secure Agent-Mediated Auctionlike Negotiation Protocol for Internet Retail Commerce. CIA 1999: 291-302
19		Kazumasa Omote, Eiji Okamoto: User Identification System Based on Biometrics for Keystroke. ICICS 1999: 216-229
18		Josef Pieprzyk, Eiji Okamoto: Verfiable Secret Sharing and Time Capsules. ICISC 1999: 169-183
17		Shigeki Kitazawa, Xun Yi, Eiji Okamoto, Masahiro Mambo: Improvement of Secure Access Control Agent for Distributed Files. ICPP Workshops 1999: 185-
16		Takeshi Okamoto, Mitsuru Tada, Eiji Okamoto: Extended Proxy Signatures for Smart Cards. ISW 1999: 247-258
	1998
15		Eiji Okamoto, George I. Davida, Masahiro Mambo: Information Security, First International Workshop, ISW '97, Tatsunokuchi, Japan, September 17-19, 1997, Proceedings Springer 1998
14		Agus Fanar Syukri, Eiji Okamoto, Masahiro Mambo: A User Identification System Using Signature Written with Mouse. ACISP 1998: 403-414
13		Xiao Feng Wang, Xun Yi, Kwok-Yan Lam, Eiji Okamoto: Secure Information Gathering Agent for Internet Trading. DAI 1998: 183-193
12		Xun Yi, Xiao Feng Wang, Kwok-Yan Lam, Eiji Okamoto, D. Frank Hsu: A Security Auction-Like Negotiation Protocol for Agent-Based Internet Trading. SRDS 1998: 197-203
	1997
11		Masahiro Mambo, Eiji Okamoto, Kouichi Sakurai: Protection of Data and Delegated Keys in Digital Distribution. ACISP 1997: 271-282
10		Kenichi Hayashi, Eiji Okamoto, Masahiro Mambo: Proposal of user identification scheme using mouse. ICICS 1997: 144-148
9		Hisao Sakazaki, Eiji Okamoto, Masahiro Mambo: The Application of ID-Based Key Distribution Systems to an Elliptic Curve. ISW 1997: 335-344
8		Tomohiko Uyematsu, Eiji Okamoto: A construction of codes with exponential error bounds on arbitrary discrete memoryless channels. IEEE Transactions on Information Theory 43(3): 992-996 (1997)
	1996
7		Masahiro Mambo, Keisuke Usuda, Eiji Okamoto: Proxy Signatures for Delegating Signing Operation. ACM Conference on Computer and Communications Security 1996: 48-57
6		Masahiro Mambo, Kouichi Sakurai, Eiji Okamoto: How to Utilize the Transformability of Digital Signatures for Solving the Oracle Problem. ASIACRYPT 1996: 322-333
	1994
5		Yukiyasu Tsunoo, Eiji Okamoto, Tomohiko Uyematsu: Ciphertext Only Attack for One-way Function of the MAP Using One Ciphertext. CRYPTO 1994: 369-382
	1991
4		Kazue Tanaka, Eiji Okamoto: Key distribution system for mail systems using ID-related information directory. Computers & Security 10(1): 25-33 (1991)
	1988
3		Eiji Okamoto: Substantial Number of Cryptographic Keys and Its Application to Encryption Designs. EUROCRYPT 1988: 361-373
	1987
2		Eiji Okamoto: Key Distribution Systems Based on Identification Information. CRYPTO 1987: 194-202
	1985
1		Eiji Okamoto, K. Nakamura: Lifetimes of Keys in Cryptographic Key Management Systems. CRYPTO 1985: 246-259

Coauthor Index

1	Jean-Luc Beuchat	[54] [60] [61] [63] [67] [68] [79]
2	Colin Boyd	[51] [58]
3	Nicolas Brisebarre	[54] [61] [67] [68]
4	Mike Burmester	[23]
5	Zhenfu Cao	[47]
6	Robert S. Coulter	[29]
7	George I. Davida	[15]
8	Ed Dawson	[27] [29] [30] [34] [37] [45] [51]
9	Yvo Desmedt	[23]
10	Jérémie Detrey	[61] [67] [68] [79]
11	Hiroshi Doi	[23] [24] [38] [52]
12	Nicolas Estibals	[79]
13	Mike Faulkner	[73]
14	Chunxiang Gu	[62]
15	Kenichi Hayashi	[10]
16	Marie Henderson	[29]
17	Florian Hess	[59] [74]
18	D. Frank Hsu	[12]
19	Atsuo Inomata	[41] [48] [49] [65]
20	Akira Kanaoka	[33]
21	Naoki Kanayama	[59] [74]
22	Hirofumi Katsuno	[31]
23	Yuto Kawahara	[50] [53]
24	Shigeki Kitazawa	[17]
25	Atsushi Koide	[71] [72]
26	Kwok-Yan Lam	[12] [13] [20] [21]
27	Javier Lopez	[27] [30] [36] [37] [45]
28	Mamoru Maekawa	[35]
29	Masahiro Mambo	[6] [7] [9] [10] [11] [14] [15] [17] [23] [24] [28] [48] [49] [65]
30	Seiichi Matsuda	[59] [74]
31	Ying Miao	[32] [38] [47] [52]
32	Takanori Miyoshi	[63]
33	José A. Montenegro	[27] [37]
34	K. Nakamura	[1]
35	Nidal Nasser	[65]
36	Juan Manuel González Nieto (Juanma González Nieto)	[34] [45] [58]
37	Takeshi Okamoto	[16] [31] [38] [39] [40] [41] [42] [43] [44] [47] [49] [52] [55] [56] [58] [62] [64] [65] [69] [78]
38	Tatsuaki Okamoto	[64]
39	Kazumasa Omote	[19]
40	Yoshihito Oyama	[63]
41	Kun Peng	[45] [51]
42	Josef Pieprzyk	[18] [26]
43	Sihan Qing	[36] [46]
44	Sk. Md. Mizanur Rahman	[48] [49] [65]
45	Francisco Rodríguez-Henríquez	[68] [79]
46	Anton Romanov	[75] [76]
47	Bimal K. Roy	[25]
48	Selwyn Russell	[30]
49	Hisao Sakazaki	[9]
50	Kouichi Sakurai	[6] [11]
51	Ryôichi Sasaki	[46]
52	Chifumi Sato	[78]
53	Jennifer Seberry (Jennifer Seberry Wallis)	[26]
54	Yasushi Sengoku	[28]
55	Masaaki Shirase	[53] [54] [57] [60] [66] [67] [70]
56	Chee Kheong Siew	[22]
57	Masakazu Soshi	[35]
58	Agus Fanar Syukri	[14]
59	Mitsuru Tada	[16] [23]
60	Tsuyoshi Takagi	[42] [44] [50] [53] [54] [57] [60] [64] [66] [67] [70]
61	Kazue Tanaka	[4]
62	Takashi Tanaka	[28]
63	Raylin Tso	[32] [40] [42] [43] [55] [56] [58] [62] [69] [71] [72] [77]
64	Yukiyasu Tsunoo	[5]
65	Keisuke Usuda	[7]
66	Tomohiko Uyematsu	[5] [8]
67	José Luis Vivas	[37]
68	Lihua Wang	[38] [44] [47] [52]
69	Xiao Feng Wang	[12] [13] [20] [22]
70	Chaoping Xing	[21]
71	Xun Yi	[12] [13] [17] [20] [22] [73] [77]
72	Yuko Yoshifuji	[23]
73	Hiroshi Yoshiura	[46]
74	C. Q. Zhang	[20]

Colors in the list of coauthors