Abstract
An extended ciphertext-policy attribute based encryption (ECP-ABE) scheme was proposed which extends tree access structure to support access policy formulas involving not and comparing operators, and significantly enhanced access control capabiity of CP-ABE scheme. ECP-ABE improves the access control ability of CP-ABE obviously and is proven to be chosen plaintext (CPA) secure under the decisional Bilinear Diffie-Hellman (DBDH) assumption in the standard model. Extended access tree structure does not bring extra security to the encyption system.
| Original language | English |
|---|---|
| Pages (from-to) | 113-115+145 |
| Journal | Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) |
| Volume | 40 |
| Issue number | SUPPL.1 |
| State | Published - Dec 2012 |
Keywords
- Access control
- Access structure
- Ciphertext-policy attribute based encryption(CP-ABE)
- Cloud computing
- Extend
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