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 、
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。大家可...
Ciphertext-Policy Attribute-Based EncryptionJohn BethencourtCarnegie Mellon Universitybethenco@cs.cmu.eduAmit SahaiUCLAsahai@cs.ucla.eduBrent WatersSRI Internationalbwaters@csl.sri.comAbstractIn several distributed systems a user should only be ableto access data if a user posses a certain set of cre...
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 ...
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...
Multi-Authority Attribute Based Encryption基于属性的加密多权威 热度: A secure and efficient Ciphertext-Policy Attribute-Based Proxy Re-Encryption for cloud data sharing-英文资料 热度: Ciphertext-Policy Attribute-Based Encryption An Expressive, E… 热度: 相关推荐 Ciphertext-Policy Attribute-Based...
Ciphertext-Policy Attribute-Based Encryption: An Expressive, E?cient, and Provably Secure Realization Brent Waters ? University of Texas at Austin bwaters@cs.utexas.edu Abstract We present a new methodology for realizing Ciphertext-Policy Attribute Encryption (CPABE) under concrete and noninteractive ...
Attribute-Based Encryption [SW05] PK MSK “Undercover” “Central” “Undercover” “Valley” OR Int. Affairs AND Undercover Central OR Int. Affairs AND Undercover Central SK SK Key Authority Á = 8 First Approach & Collusion Attacks SK ...
Ciphertext-Policy Attribute-Based Encryption: An Expressive, E?cient, and Provably Secure Realization Brent Waters? University of Texas at Austin Abstract We present a new methodology for realizing Ciphertext-Policy Attribute Encryption (CPABE) under concrete and noninteractive cryptographic assumptions in...
Then we give the security definitions of ciphertext policy attribute based encryption (CP-ABE). Finally, we give background information on bilinear maps. Access Structures Definition 1 (Access Structure [6]) Let {P1,P2,. . .,Pn} be a set of parties. A collection A ? 2{P1,P2,...,...