Paper 2012/136
Adaptive Key Protection in Complex Cryptosystems with Attributes
Zilong Wang, Danfeng (Daphne) Yao, and Rongquan Feng
Abstract
In the attribute-based encryption (ABE) model, attributes (as opposed to identities) are used to encrypt messages, and all the receivers with qualifying attributes can decrypt the ciphertext. However, compromised attribute keys may affect the communications of many users who share the same access control policies. We present the notion of forward-secure attribute-based encryption (fs-ABE) and give a concrete construction based on bilinear map and decisional bilinear Diffie-Hellman assumption. Forward security means that a compromised private key by an adversary at time
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Attribute-based encryptionforward securitykey update
- Contact author(s)
- zlwangmath @ gmail com
- History
- 2012-03-22: received
- Short URL
- https://ia.cr/2012/136
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2012/136, author = {Zilong Wang and Danfeng (Daphne) Yao and Rongquan Feng}, title = {Adaptive Key Protection in Complex Cryptosystems with Attributes}, howpublished = {Cryptology {ePrint} Archive, Paper 2012/136}, year = {2012}, url = {https://eprint.iacr.org/2012/136} }