Miyako OHKUBO


Opcount: A Pseudo-Code Performance Estimation System for Pairing-Based Cryptography
Masayuki ABE Fumitaka HOSHINO Miyako OHKUBO 
Publication:   
Publication Date: 2019/09/01
Vol. E102-A  No. 9  pp. 1285-1292
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
pairingperformance estimationbenchmarktight security
 Summary | Full Text:PDF(1.3MB)

Fast and Scalable Bilinear-Type Conversion Method for Large Scale Crypto Schemes
Masayuki ABE Fumitaka HOSHINO Miyako OHKUBO 
Publication:   
Publication Date: 2019/01/01
Vol. E102-A  No. 1  pp. 251-269
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
pairing-based cryptographybilinear-type conversioninteger programmingcryptographic scheme designGroth-Sahai proofs
 Summary | Full Text:PDF(4.6MB)

Relations among Notions of Privacy for RFID Authentication Protocols
Daisuke MORIYAMA Shin'ichiro MATSUO Miyako OHKUBO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 225-235
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Based Cryptography
Keyword: 
RFIDauthenticationsecurity model
 Summary | Full Text:PDF(688.9KB)

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 encryptionanonymous hierarchical identity-based encryptionpublic-key encryption with keyword search
 Summary | Full Text:PDF(669.6KB)

On the Definitions of Anonymity for Ring Signatures
Miyako OHKUBO Masayuki ABE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 272-282
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Security Notions
Keyword: 
ring signatureanonymitylinkability
 Summary | Full Text:PDF(213.9KB)

Efficient Threshold Signer-Ambiguous Signatures from Variety of Keys
Masayuki ABE Miyako OHKUBO Koutarou SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/02/01
Vol. E87-A  No. 2  pp. 471-479
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
signer ambiguityring signaturethreshold signaturegroup signature
 Summary | Full Text:PDF(218.4KB)

1-out-of-n Signatures from a Variety of Keys
Masayuki ABE Miyako OHKUBO Koutarou SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/01/01
Vol. E87-A  No. 1  pp. 131-140
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Asymmetric Cipher
Keyword: 
signer ambiguityring signaturediscrete-log
 Summary | Full Text:PDF(304.4KB)

A Length-invariant Hybrid Mix
Miyako OHKUBO Masayuki ABE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/04/01
Vol. E84-A  No. 4  pp. 931-940
Type of Manuscript:  Special Section PAPER (Special Section on Fundamentals of Information and Communications)
Category: 
Keyword: 
hybrid mixmix-nethybrid encryptionanonymous channel
 Summary | Full Text:PDF(293.6KB)