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2006
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Attribute-based encryption for fine-grained access control of encrypted data

9 years 2 months ago
Attribute-based encryption for fine-grained access control of encrypted data
As more sensitive data is shared and stored by third-party sites on the Internet, there will be a need to encrypt data stored at these sites. One drawback of encrypting data, is that it can be selectively shared only at a coarse-grained level (i.e., giving another party your private key). We develop a new cryptosystem for fine-grained sharing of encrypted data that we call Key-Policy Attribute-Based Encryption (KP-ABE). In our cryptosystem, ciphertexts are labeled with sets of attributes and private keys are associated with access structures that control which ciphertexts a user is able to decrypt. We demonstrate the applicability of our construction to sharing of audit-log information and broadcast encryption. Our construction supports delegation of private keys which subsumes Hierarchical Identity-Based Encryption (HIBE).
Vipul Goyal, Omkant Pandey, Amit Sahai, Brent Wate
Added 20 Aug 2010
Updated 20 Aug 2010
Type Conference
Year 2006
Where CCS
Authors Vipul Goyal, Omkant Pandey, Amit Sahai, Brent Waters
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