Paper 2017/219

Attribute-Based Encryption from Identity-Based Encryption

Chun-I Fan, Yi-Fan Tseng, and Chih-Wen Lin

Abstract

Ciphertext-policy attribute-based encryption (CP-ABE) is an access control mechanism where a data provider encrypts a secret message and then sends the ciphertext to the receivers according to the access policy which she/he decides. If the attributes of the receivers match the access policy, then they can decrypt the ciphertext. This paper shows a relation between ABE and identity-based encryption (IBE), and presents a bi-directional conversion between an access structure and identities. By the proposed conversion, the ABE scheme constructed from an IBE scheme will inherit the features, such as constant-size ciphertexts and anonymity, from the IBE scheme, and vice versa. It turns out that the proposed conversion also gives the first ABE achieving access structures with wildcard and constant-size ciphertexts/private keys.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
attribute-based encryptionidentity-based encryptionconstant-size ciphertextskeyshidden access policiesanonymitypublic-key cryptography
Contact author(s)
cifan @ mail cse nsysu edu tw
History
2018-01-30: last of 2 revisions
2017-03-04: received
See all versions
Short URL
https://ia.cr/2017/219
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2017/219,
      author = {Chun-I Fan and Yi-Fan Tseng and Chih-Wen Lin},
      title = {Attribute-Based Encryption from Identity-Based Encryption},
      howpublished = {Cryptology ePrint Archive, Paper 2017/219},
      year = {2017},
      note = {\url{https://eprint.iacr.org/2017/219}},
      url = {https://eprint.iacr.org/2017/219}
}
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