K
Keita Emura
Researcher at National Institute of Information and Communications Technology
Publications - 151
Citations - 2124
Keita Emura is an academic researcher from National Institute of Information and Communications Technology. The author has contributed to research in topics: Encryption & Group signature. The author has an hindex of 19, co-authored 133 publications receiving 1820 citations. Previous affiliations of Keita Emura include Japan Advanced Institute of Science and Technology.
Papers
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Journal Article
A Ciphertext-Policy Attribute-Based Encryption Scheme with Constant Ciphertext Length
TL;DR: In this article, a new Ciphertext-Policy Attribute-Based Encryption (CP-ABE) with constant ciphertext length was proposed, and the number of pairing computations was also constant.
Book ChapterDOI
Revocable Identity-Based Encryption Revisited: Security Model and Construction
Jae Hong Seo,Keita Emura +1 more
TL;DR: In this article, the authors revisited the Boldyreva et al. security model, and proposed a scalable RIBE scheme with decryption key exposure resistance, which is more efficient than previous (adaptively secure) scalable IBE schemes.
Posted Content
Revocable Identity-Based Encryption Revisited: Security Model and Construction.
Jae Hong Seo,Keita Emura +1 more
TL;DR: A simple RIBE scheme is proposed, which is the first scalable R IBE scheme with decryption key exposure resistance, and is more efficient than previous (adaptively secure) scalable RibE schemes.
Book ChapterDOI
A Ciphertext-Policy Attribute-Based Encryption Scheme with Constant Ciphertext Length
TL;DR: A new Ciphertext-Policy Attribute-Based Encryption (CP-ABE) with constant ciphertext length and the number of pairing computations is also constant.
Journal ArticleDOI
A ciphertext-policy attribute-based encryption scheme with constant ciphertext length
TL;DR: The number of additional bits required from chosen plain text attack-secure CP-ABE to chosen ciphertext attack- secure CP- ABE is reduced by 90% with respect to that of the previous scheme.