Decentralizing Attribute-Based Encryption

7 years 9 months ago
Decentralizing Attribute-Based Encryption
We propose a Multi-Authority Attribute-Based Encryption (ABE) system. In our system, any party can become an authority and there is no requirement for any global coordination other than the creation of an initial set of common reference parameters. A party can simply act as an ABE authority by creating a public key and issuing private keys to different users that reflect their attributes. A user can encrypt data in terms of any boolean formula over attributes issued from any chosen set of authorities. Finally, our system does not require any central authority. In constructing our system, our largest technical hurdle is to make it collusion resistant. Prior Attribute-Based Encryption systems achieved collusion resistance when the ABE system authority “tied” together different components (representing different attributes) of a user’s private key by randomizing the key. However, in our system each component will come from a potentially different authority, where we assume no ...
Allison B. Lewko, Brent Waters
Added 28 Aug 2011
Updated 28 Aug 2011
Type Journal
Year 2011
Authors Allison B. Lewko, Brent Waters
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