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...
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...
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 EncryptionJohn BethencourtCarnegie Mellon Universitybethenco@cs.cmu.eduAmit Sahai∗UCLAsahai@cs.ucla..
Ciphertext Policy Attribute-Based Encryption from Lattices ∗,Sahai和Waters[21]提出了基于属性的加密(ABE)作为一种新的加密算法范式,它允许发送方设置一个策略来描述谁可以解密特定的密文。本文首先提出了一种基于格的密文策略属性加密方案,该方案支持对文字(或布
Ciphertext-Policy Attribute-Based Encryption: An Expressive, Efficient, and Provably Secure Realization Brent Waters ∗ University of Texas at Austin Abstract We present a new methodology for realizing Ciphertext-Policy Attribute Encryption (CP- ABE) under concrete and noninteractive cryptographic assum...
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,...,...
Ciphertext-policy attribute-based broadcast encryption scheme. Communications and Multimedia Security: Proceedings of the 12th IFIP TC 6/TC 11 International Conference on Communications and Multimedia Security (CMS'11), Oct 19-21, 2011, Ghent, Belgium. LNCS 7025. Berlin, Germany: Springer-Verlag, ...
Ciphertext-PolicyAttribute-BasedEncryption 系统标签: encryptionciphertexthybattributeobfuscationpunctured Brent Waters Amit Sahai How to Use Indistinguishability Obfuscation 2 Code Obfuscation Goal: Make program (maximally) unintelligible Obfuscator 3 Applications! Demo or “need to know” software Software Pat...
“Ciphertext Policy” 19 Attribute-Based Encryption Key: y = Á X SK Y CT: x = (M, X 2 {0,1} n ) f( x=(M,X ), y) = SW05, GPSW06, C07, BSW07, OSW07, GJPS08, W08 M , Á if Á(X) = true X if Á(X) = false “Annotated” “Key Policy” 20 Anonymous ...