The limited storage capacity of small devices, such as mobile phone, has become a bottleneck for the development of many application, especially for security applications. The Ciphertext Policy Attributes Based-Encryption (CP-ABE) is a promising cryptographic scheme that allows encryption to choose an access structure that protects sensitive data. However, one of the problems with current CP-ABE scheme is the length of the key, whose size increases linearly with the number of attributes. In this paper, we propose a CP-ABE scheme for a constant size key. By modifying the modulus index in the key generation algorithm, the computational cost is reduced to a constant. Compared with other schemes for the literature, the private key is independent of the number of attributes.
CITATION STYLE
Li, C., Wang, X. A., Sangaiah, A. K., Yang, H., & Shan, C. (2018). Verifiable outsourced attribute based encryption scheme with fixed key size. In Lecture Notes on Data Engineering and Communications Technologies (Vol. 17, pp. 792–800). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-319-75928-9_71
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