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IEICE Trans

Kaisei KAJITA

Outsider-Anonymous Broadcast Encryption with Keyword Search: Generic Construction, CCA Security, and with Sublinear Ciphertexts
Keita EMURA Kaisei KAJITA Go OHTAKE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2024/09/01
Vol. E107-A  No. 9  pp. 1465-1477
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Cryptography and Information Security
Keyword: 
broadcast encryption with keyword search, outsider anonymity, CCA security, 
 Summary | Full Text:PDF
Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption
Kaisei KAJITA Go OHTAKE Kazuto OGAWA Koji NUIDA Tsuyoshi TAKAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2023/03/01
Vol. E106-A  No. 3  pp. 228-240
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
digital signatures, ring-SIS assumption, security reduction, trapdoor commitment, 
 Summary | Full Text:PDF
Privacy-Preserving System for Enriched-Integrated Service
Kaisei KAJITA Go OHTAKE Kazuto OGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2021/05/01
Vol. E104-D  No. 5  pp. 647-658
Type of Manuscript:  Special Section PAPER (Special Section on the Architectures, Protocols, and Applications for the Future Internet)
Category: 
Keyword: 
privacy preserving, attribute-based keyword search, integrated broadcast-broadband service, 
 Summary | Full Text:PDF
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption
Kaisei KAJITA Kazuto OGAWA Eiichiro FUJISAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2020/01/01
Vol. E103-A  No. 1  pp. 141-149
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
digital signature, CDH assumption, trapdoor commitment, tight security reduction, 
 Summary | Full Text:PDF