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Paper 2019/966

Fast, Compact, and Expressive Attribute-Based Encryption

Junichi Tomida and Yuto Kawahara and Ryo Nishimaki

Abstract

Attribute-based encryption (ABE) is an advanced cryptographic tool and useful to build various types of access control systems. Toward the goal of making ABE more practical, we propose key-policy (KP) and ciphertext-policy (CP) ABE schemes, which first support unbounded sizes of attribute sets and policies with negation and multi-use of attributes, allow fast decryption, and are fully secure under a standard assumption, simultaneously. The proposed schemes are more expressive than previous schemes and efficient enough. We also implement our schemes in 128-bit security level and present their benchmarks for an ordinary personal computer and smartphones. They show that all algorithms run in one second with the personal computer when they handle any policy or attribute set with one hundred attributes.

Note: fix some terminology

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
attribute-based encryptionstandard assumptionnon-monotoneunboundedmulti-userandom oracle model
Contact author(s)
junichi tomida vw @ hco ntt co jp
History
2020-02-12: last of 2 revisions
2019-08-26: received
See all versions
Short URL
https://ia.cr/2019/966
License
Creative Commons Attribution
CC BY
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