Ciphertext-policyAttribute-based encryptionDecentralizedMulti-authorityFast decryptionLightweight devicesIn a traditional attribute-based encryption (ABE) system, there is only one central authority who generate
论文| Ciphertext-Policy Attribute-Based Encryption CP-ABE | 07年基于访问树的方案推导 算法主要包括五个部分: Setup Setup算法不接受除了隐式的安全参数外的其他输入,输出公开参数 PK 和主密钥 MK 。 2. Encrypt(PK,M, \mathbb{A} ) Encrypt算法以公开参数 PK 、消息 M(与前面的M矩阵不一样) 和访问结...
Ciphertext Policy Attribute Based Encryption presents a promising approach in access control and encryption in a Cloud Computing environment. In this paper, we exposed a Traceable, Revocable, accountable and Key escrow free (TRAK-CPABE) solution. It ensures white-box traceability, adds a match then...
Ciphertext-policy attribute-based encryption (CP-ABE) is a promising public key encryption primitive enabling fine-grained access control on shared data in public cloud. However, two quite challenging issues, the prevention of key escrow and key abuse, still exist in CP-ABE system. In this ...
We present a new methodology for realizing Ciphertext-Policy Attribute Encryption (CP-ABE) under concrete and noninteractive cryptographic assumptions in the standard model. Our solutions allow any encryptor to specify access control in terms of any acce
论文| Ciphertext-Policy Attribute-Based Encryption 导读 2007年,第一篇CP-ABE方案。CP-ABE的开山之作,作者之前已经有了相关的工作基础。这篇是基于访问树的CP-ABE,在2011年又提出了基于LSSS的CP-ABE方案。 这篇文章是对原论文的翻译,为了帮助大家更好地理解,在前面对一些内容专门写了文章进行深入讲解。大家...
Policy Attribute-Based Encryption.By using our techniques encrypted data can be kept con-fidential even if the storage server is untrusted; moreover,our methods are secure against collusion attacks. Previ-ous Attribute-Based Encryption systems used attributes todescribe the encrypted data and built ...
接触CP-ABE（Ciphertext-Policy Attribute-Based Encryption），总结学习心得。ABE，即基于属性加密，是实现精准化访问控制的公钥密码算法。ABE分为两类：KP-ABE适用于灵活性需求高，用户数量少的场景；CP-ABE则适用于用户数量多，追求高扩展性的场景。CP-ABE在加密文件时，根据访问策略设置属性，符合属性的...
control on encrypted data that we call Ciphertext-Policy Attribute-Based Encryption. By using our techniques encrypted data can be kept confidential even if the stor- age server is untrusted; moreover, our methods are secure against collusion attacks. Previous Attribute- Based Encryption systems...
2.3 Ciphertext-Policy ABE An ciphertext-policy attribute based encryption scheme consists of four algorithms: Setup, Encrypt, KeyGen, and Decrypt. Setup(λ, U ). The setup algorithm takes security parameter and attribute universe description as input. It outputs the public parameters PK and a ...