A Type-and-Identity-based Proxy Re-Encryption Scheme and its Application in Healthcare


Ibraimi, Luan and Tang, Qiang and Hartel, Pieter and Jonker, Willem (2008) A Type-and-Identity-based Proxy Re-Encryption Scheme and its Application in Healthcare. [Report]

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Abstract:Proxy re-encryption is a cryptographic primitive developed to delegate the decryption right from one party (the delegator) to another (the delegatee). In a proxy re-encryption scheme, the delegator assigns a key to a proxy to re-encrypt all messages encrypted with his public key such that the re-encrypted ciphertexts can be decrypted with the delegatee's private key. We propose a type-and-identity-based proxy re-encryption scheme based on the Boneh-Franklin Identity Based Encryption (IBE) scheme. In our scheme, the delegator can categorize messages into different types and delegate the decryption right of each type to the delegatee through a proxy. Our scheme enables the delegator to provide the proxy fine-grained re-encryption capability. As an application, we propose a fine-grained Personal Health Record (PHR) disclosure scheme for healthcare service by applying the proposed scheme.
Item Type:Report
Copyright:© 2008 University of Twente, Centre for Telematics and Information Technology
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/64713
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