A Threshold-Blind Signature Scheme and Its Application in Blockchain-Based Systems

Autor: Victor Reyes-Macedo, Akinori Kawachi, Gina Gallegos-Garcia, Moises Salinas-Rosales

Publikováno v: IEEE Access, Vol 12, Pp 138239-138251 (2024)

In blockchain-based systems usually there are two common concerns: one of them is privacy and other is key management. Besides privacy has been widely studied, nor key management has been done so deeply, moreover, the conjunction of both neither has

Externí odkaz: https://doaj.org/article/1d202cad6bc4471a8dade1bad1e35b1d

Quantum Query Complexity of Unitary Operator Discrimination

Autor: François Le Gall, Kenichi Kawano, Akinori Kawachi, Suguru Tamaki

Publikováno v: IEICE Transactions on Information and Systems. :483-491

Unitary operator discrimination is a fundamental problem in quantum information theory. The basic version of this problem can be described as follows: given a black box implementing a quantum operator U, and the promise that the black box implements

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8d40129476c1ac90b047087efa86e7c8
https://doi.org/10.1587/transinf.2018fcp0012

Secure Primitive for Big Data Utilization

Autor: Akinori Kawachi, Yuuki Takano, Atsuko Miyaji, Yiying Qi, Kazuhisa Nakasho

Publikováno v: Security Infrastructure Technology for Integrated Utilization of Big Data ISBN: 9789811536533
Security Infrastructure Technology for Integrated Utilization of Big Data

In this chapter, we describe two security primitives for big data utilization. One is a privacy-preserving data integration among databases distributed in different organizations. This primitive integrates the same data among databases kept in differ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17fc71a5734c57a9ab07d972ecad49cc
https://doi.org/10.1007/978-981-15-3654-0_3

Lower Bounds for Key Length of k-wise Almost Independent Permutations and Certain Symmetric-Key Encryption Schemes

Autor: Akinori Kawachi, Keisuke Tanaka, Hirotoshi Takebe

Publikováno v: Advances in Information and Computer Security ISBN: 9783319445236
IWSEC

The k-wise almost independent permutations are one of important primitives for cryptographic schemes and combinatorial constructions. Kaplan, Naor, and Reingold showed a general construction for k-wise almost independent permutations, and Kawachi, Ta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a54e7ee823c602b3b1ae7627293bea6
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100746281

Post-Challenge Leakage Resilient Public-Key Cryptosystem in Split State Model

Autor: Keisuke Tanaka, Akinori Kawachi, Kenji Yasunaga, Eiichiro Fujisaki, Ryo Nishimaki

Publikováno v: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. :853-862

SUMMARY Leakage resilient cryptography is often considered in the presence of a very strong leakage oracle: An adversary may submit arbitrary efficiently computable function f to the leakage oracle to receive f (x), where x denotes the entire secret

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c3aaaa02a2c6e1b639052b335edf179
https://doi.org/10.1587/transfun.e98.a.853