Hikaru MORITA


Adaptive FIR Filtering for PAPR Reduction in OFDM Systems
Hikaru MORITA Teruyuki MIYAJIMA Yoshiki SUGITANI 
Publication:   
Publication Date: 2019/08/01
Vol. E102-A  No. 8  pp. 938-945
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
OFDMPAPRp-normadaptive algorithmchannel estimation
 Summary | Full Text:PDF(2.9MB)

Security and Performance Evaluation of ESIGN and RSA on IC Cards by Using Byte-Unit Modular Algorithms
Chung-Huang YANG Hikaru MORITA Tatsuaki OKAMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/03/01
Vol. E88-B  No. 3  pp. 1244-1248
Type of Manuscript:  LETTER
Category: Fundamental Theories for Communications
Keyword: 
digital signatureESIGNPKIsmartcardsmodular arithmetic
 Summary | Full Text:PDF(165.9KB)

An Auction Protocol Preserving Privacy of Losing Bids with a Secure Value Comparison Scheme
Koji CHIDA Kunio KOBAYASHI Hikaru MORITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/01/01
Vol. E87-A  No. 1  pp. 173-181
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Applications
Keyword: 
sealed-bid auctionvalue comparisoncollision-resistant functiondecision Diffie-Hellman problem
 Summary | Full Text:PDF(270.9KB)

Multiple Scalar-Multiplication Algorithm over Elliptic Curve
Kunio KOBAYASHI Hikaru MORITA Mitsuari HAKUTA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2001/02/01
Vol. E84-D  No. 2  pp. 271-276
Type of Manuscript:  PAPER
Category: Applications of Information Security Techniques
Keyword: 
multiple scalar multiplicationelliptic curve
 Summary | Full Text:PDF(393.4KB)

Secure Protocol to Construct Electronic Trading
Shin'ichiro MATSUO Hikaru MORITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/01/01
Vol. E84-A  No. 1  pp. 281-288
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
market tradingelectronic auctioncomparingbit commitment
 Summary | Full Text:PDF(474.3KB)

Efficient Sealed-Bid Auction by Using One-Way Functions
Kunio KOBAYASHI Hikaru MORITA Koutarou SUZUKI Mitsuari HAKUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/01/01
Vol. E84-A  No. 1  pp. 289-294
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
sealed-bid auctionquantitative competitionone-way functionbit commitment
 Summary | Full Text:PDF(216.9KB)

An Electronic Soccer Lottery System that Uses Bit Commitment
Kunio KOBAYASHI Hikaru MORITA Mitsuari HAKUTA Takanori NAKANOWATARI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2000/05/25
Vol. E83-D  No. 5  pp. 980-987
Type of Manuscript:  Special Section PAPER (Special Issue on Next Generation Internet Technologies and Their Applications)
Category: 
Keyword: 
soccer lotterysecuritybit commitmenthash functiondigital signaturebulletin board
 Summary | Full Text:PDF(594.4KB)

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 inversionMontgomery methodbinary GCDEuclidean algorithmelliptic curve cryptosystem
 Summary | Full Text:PDF(1MB)

Collision Search of a Hash Function by Using Random Mapping
Hikaru MORITA Hideki ODAGI Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/01/25
Vol. E81-A  No. 1  pp. 35-40
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
hash functioncollisionpseudo random functionrandom mapping
 Summary | Full Text:PDF(471.5KB)

New Proposal and Comparison of Closure Tests--More Efficient than the CRYPTO'92 Test for DES--
Hikaru MORITA Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/01/25
Vol. E77-A  No. 1  pp. 15-19
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
switching closure test (SCT)cycling closure test (CCT)meet-in-the-middle closure test (MCT)DES cipher
 Summary | Full Text:PDF(413.2KB)

A Modular-Multiplication Algorithm Using Lookahead Determination
Hikaru MORITA Chung-Huang YANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/01/25
Vol. E76-A  No. 1  pp. 70-77
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
modular multiplicationmulti-precision arithmeticsmart carddigital signatureRobertson diagram
 Summary | Full Text:PDF(559.1KB)

A Switching Closure Test to Analyze Cryptosystems
Hikaru MORITA Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/04/25
Vol. E75-A  No. 4  pp. 498-503
Type of Manuscript:  Special Section PAPER (Special Issue on Discrete Mathematics and Its Application)
Category: 
Keyword: 
cryptosystemgroupclosure testmeet-in-the-middle techniqueDES cipherRSA schemebirth-day paradox
 Summary | Full Text:PDF(440.9KB)

Hardware Approach to Fast Encipherment Processing and Its Implementation
Hikaru MORITA Michihiro YAMANE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/08/25
Vol. E74-A  No. 8  pp. 2143-2152
Type of Manuscript:  Special Section PAPER (Special Issue on Cryptography and Information Security)
Category: 
Keyword: 
 Summary | Full Text:PDF(878.5KB)

A Fast Modular-multiplication Algorithm Based on a Radix 4 and Its Application
Hikaru MORITA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/07/25
Vol. E73-E  No. 7  pp. 1081-1086
Type of Manuscript:  Special Section PAPER (Special Issue on Cryptography and Information Security)
Category: Public-Key Systems
Keyword: 
 Summary | Full Text:PDF(380.2KB)

Finite-Element Analysis of Discontinuity Problem of SH-Type Modes in a Piezoelectric Plate Waveguide
Masanori KOSHIBA Hikaru MORITA Michio SUZUKI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1982/09/25
Vol. E65-E  No. 9  pp. 522-528
Type of Manuscript:  PAPER
Category: Miscellaneous
Keyword: 
 Summary | Full Text:PDF(372.1KB)