IEICE Trans

Keita EMURA

Privacy-Preserving Data Analysis: Providing Traceability without Big Brother Hiromi ARAI Keita EMURA Takuya HAYASHI
Publication: Publication Date: 2021/01/01 Vol. E104-A No. 1 pp. 2-19 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: privacy-preserving data analysis, group signature with message-dependent opening, public key encryption with non-interactive opening,
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On the Security of Keyed-Homomorphic PKE: Preventing Key Recovery Attacks and Ciphertext Validity Attacks Keita EMURA
Publication: Publication Date: 2021/01/01 Vol. E104-A No. 1 pp. 310-314 Type of Manuscript: LETTER Category: Cryptography and Information Security Keyword: Keyed-Homomorphic PKE, CCA security, key recovery attacks, ciphertext validity attacks,
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A Revocable Group Signature Scheme with Scalability from Simple Assumptions Keita EMURA Takuya HAYASHI
Publication: Publication Date: 2020/01/01 Vol. E103-A No. 1 pp. 125-140 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: group signatures, anonymity, revocation, scalability, identity management system,
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Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology Kazuma OHARA Keita EMURA Goichiro HANAOKA Ai ISHIDA Kazuo OHTA Yusuke SAKAI
Publication: Publication Date: 2019/09/01 Vol. E102-A No. 9 pp. 1101-1117 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: group signature, revocation, scalability,
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Generic Constructions for Fully Secure Revocable Attribute-Based Encryption Kotoko YAMADA Nuttapong ATTRAPADUNG Keita EMURA Goichiro HANAOKA Keisuke TANAKA
Publication: Publication Date: 2018/09/01 Vol. E101-A No. 9 pp. 1456-1472 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: revocable attribute-based encryption, pair encoding, identity-based revocation, doubly spatial encryption,
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Group Signature with Deniability: How to Disavow a Signature Ai ISHIDA Keita EMURA Goichiro HANAOKA Yusuke SAKAI Keisuke TANAKA
Publication: Publication Date: 2017/09/01 Vol. E100-A No. 9 pp. 1825-1837 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: group signature, deniability, non-interactive zero-knowledge proof, bilinear map,
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Semi-Generic Transformation of Revocable Hierarchical Identity-Based Encryption and Its DBDH Instantiation Keita EMURA Jae Hong SEO Taek-Young YOUN
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2016/01/01 Vol. E99-A No. 1 pp. 83-91 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: revocable hierarchical identity-based encryption, semi-generic transformation,
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Disavowable Public Key Encryption with Non-Interactive Opening Ai ISHIDA Keita EMURA Goichiro HANAOKA Yusuke SAKAI Keisuke TANAKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2015/12/01 Vol. E98-A No. 12 pp. 2446-2455 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Cryptography and Information Security Keyword: public key encryption with non-interactive opening, disavowability, non-interactive zero-knowledge proof,
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Revocable Identity-Based Encryption with Rejoin Functionality Jae Hong SEO Keita EMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2014/08/01 Vol. E97-A No. 8 pp. 1806-1809 Type of Manuscript: LETTER Category: Cryptography and Information Security Keyword: Revocable Identity-Based Encryption, scalability, rejoin functionality,
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On Discrete Logarithm Based Additively Homomorphic Encryption Jae Hong SEO Keita EMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/11/01 Vol. E96-A No. 11 pp. 2286-2289 Type of Manuscript: LETTER Category: Cryptography and Information Security Keyword: additive homomorphic encryption, discrete logarithm problem, ElGamal encryption,
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A Remark on “ Efficient Revocable ID-Based Encryption with a Public Channel” Jae Hong SEO Keita EMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/11/01 Vol. E96-A No. 11 pp. 2282-2285 Type of Manuscript: LETTER Category: Cryptography and Information Security Keyword: revocable identity-based encryption, scalability, decryption key exposure resilience,
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Methods for Restricting Message Space in Public-Key Encryption Yusuke SAKAI Keita EMURA Goichiro HANAOKA Yutaka KAWAI Kazumasa OMOTE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/06/01 Vol. E96-A No. 6 pp. 1156-1168 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: public-key encryption, abuse detection, format checking,
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A Timed-Release Proxy Re-Encryption Scheme Keita EMURA Atsuko MIYAJI Kazumasa OMOTE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/08/01 Vol. E94-A No. 8 pp. 1682-1695 Type of Manuscript: PAPER Category: Cryptography and Information Security Keyword: timed-release encryption, proxy re-encryption,
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