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IEICE Trans

Tetsutaro KOBAYASHI


Exposure-Resilient Identity-Based Dynamic Multi-Cast Key Distribution
Kazuki YONEYAMA Reo YOSHIDA Yuto KAWAHARA Tetsutaro KOBAYASHI Hitoshi FUJI Tomohide YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2018/06/01
Vol. E101-A  No. 6  pp. 929-944
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
multi-cast key distribution, ID-based cryptography, exposure resilience, scalability, 
 Summary | Full Text:PDF

id-eCK Secure ID-Based Authenticated Key Exchange on Symmetric and Asymmetric Pairing
Atsushi FUJIOKA Fumitaka HOSHINO Tetsutaro KOBAYASHI Koutarou SUZUKI Berkant USTAOLU Kazuki YONEYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6  pp. 1139-1155
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
identity-based authenticated key exchange, gap Bilinear Diffie-Hellman assumption, identity-based extended Canetti-Krawczyk model, random oracle model, 
 Summary | Full Text:PDF

Anonymous Hierarchical Identity-Based Encryption with Short Ciphertexts
Jae Hong SEO Tetsutaro KOBAYASHI Miyako OHKUBO Koutarou SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 45-56
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Cryptography
Keyword: 
anonymous identity-based encryption, anonymous hierarchical identity-based encryption, public-key encryption with keyword search, 
 Summary | Full Text:PDF

Faster MapToPoint on Supersingular Elliptic Curves in Characteristic 3
Yuto KAWAHARA Tetsutaro KOBAYASHI Gen TAKAHASHI Tsuyoshi TAKAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 150-155
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Mathematics
Keyword: 
MapToPoint, characteristic 3, supersingular elliptic curves, trace, ηT pairing, 
 Summary | Full Text:PDF

Security of ESIGN-PSS
Tetsutaro KOBAYASHI Eiichiro FUJISAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/07/01
Vol. E90-A  No. 7  pp. 1395-1405
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
ESIGN, PSS encoding, AER assumption, existential unforgeability against chosen-message attack (CMA security), 
 Summary | Full Text:PDF

Candidate One-Way Functions on Non-Supersingular Elliptic Curves
Taiichi SAITO Fumitaka HOSHINO Shigenori UCHIYAMA Tetsutaro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 144-150
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Elliptic Curve Cryptography
Keyword: 
one-way function, pairing-based cryptosystem, distortion map, the Weil and the Tate pairings, co-Diffie-Hellman problem, 
 Summary | Full Text:PDF

Efficient Algorithms for Tate Pairing
Tetsutaro KOBAYASHI Kazumaro AOKI Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 134-143
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Elliptic Curve Cryptography
Keyword: 
Weil pairing, Tate pairing, elliptic curve cryptosystem, fast computation, 
 Summary | Full Text:PDF

Non-Supersingular Elliptic Curves for Pairing-Based Cryptosystems
Taiichi SAITO Fumitaka HOSHINO Shigenori UCHIYAMA Tetsutaro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/05/01
Vol. E87-A  No. 5  pp. 1203-1205
Type of Manuscript:  Special Section LETTER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
non-supersingular elliptic curve, pairing-based cryptosystem, the Weil and the Tate pairings, 
 Summary | Full Text:PDF

Efficient τ-Adic Sliding Window Method on Elliptic Curve Cryptosystems
Hiroaki OGURO Tetsutaro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 113-120
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Asymmetric Ciphers
Keyword: 
elliptic curve cryptosystem, scalar multiplication, τ-adic sliding window method, precomputation, fast implementation, 
 Summary | Full Text:PDF

A Cyclic Window Algorithm for Elliptic Curves over OEF
Tetsutaro KOBAYASHI Fumitaka HOSHINO Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 121-128
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Asymmetric Ciphers
Keyword: 
cyclic window algorithm, optimal extension field, base-φ expansion, elliptic curve cryptosystem, 
 Summary | Full Text:PDF

Lenient/Strict Batch Verification in Several Groups
Fumitaka HOSHINO Masayuki ABE Tetsutaro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 64-72
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Ciphers and Hash Functions
Keyword: 
batch verification, elliptic curve cryptosystem, 
 Summary | Full Text:PDF

Base-φ Method for Elliptic Curves over OEF
Tetsutaro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/04/25
Vol. E83-A  No. 4  pp. 679-686
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
elliptic curve cryptosystem, scalar multiplication, OEF, finite field, Frobenius map, table reference method, 
 Summary | Full Text:PDF

Remarks on Elliptic Curve Discrete Logarithm Problems
Naoki KANAYAMA Tetsutaro KOBAYASHI Taiichi SAITO Shigenori UCHIYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 17-23
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
elliptic curve discrete logarithm problem, MOV algorithm, FR algorithm, 
 Summary | Full Text:PDF

Fast Modular Inversion Algorithm to Match Any Operation Unit
Tetsutaro KOBAYASHI Hikaru MORITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/05/25
Vol. E82-A  No. 5  pp. 733-740
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
modular inversion, Montgomery method, binary GCD, Euclidean algorithm, elliptic curve cryptosystem, 
 Summary | Full Text:PDF