Distributed Attribute-Based Encryption

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Distributed Attribute-Based Encryption
Ciphertext-Policy Attribute-Based Encryption (CP-ABE) allows to encrypt data under an access policy, specified as a logical combination of attributes. Such ciphertexts can be decrypted by anyone with a set of attributes that fits the policy. In this paper, we introduce the concept of Distributed Attribute-Based Encryption (DABE), where an arbitrary number of parties can be present to maintain attributes and their corresponding secret keys. This is in stark contrast to the classic CP-ABE schemes, where all secret keys are distributed by one central trusted party. We provide the first construction of a DABE scheme; the construction is very efficient, as it requires only a constant number of pairing operations during encryption and decryption.
Sascha Müller 0003, Stefan Katzenbeisser, Cla
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2008
Authors Sascha Müller 0003, Stefan Katzenbeisser, Claudia Eckert
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