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Published in:
2009 | OriginalPaper | Chapter
A Ciphertext-Policy Attribute-Based Encryption Scheme with Constant Ciphertext Length
Authors : Keita Emura, Atsuko Miyaji, Akito Nomura, Kazumasa Omote, Masakazu Soshi
Published in: Information Security Practice and Experience
Publisher: Springer Berlin Heidelberg
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An Attribute-Based Encryption (ABE) is an encryption scheme, where users with some attributes can decrypt ciphertexts associated with these attributes. However, the length of the ciphertext depends on the number of attributes in previous ABE schemes. In this paper, we propose a new Ciphertext-Policy Attribute-Based Encryption (CP-ABE) with constant ciphertext length. Moreover, the number of pairing computations is also constant.