Web基于属性加密主要分为两大类:密文策略的属性加密(cp-abe)和密钥策略的属性加密(kp-abe)。在cp-abe中密文和加密者定义的访问策略相关联,密钥则是和属性相关联; … WebMay 6, 2024 · KP-ABE (key policy attribute based encryption,密钥策略属性基加密系统):所谓密钥政策加密系统是指,密钥对应于一个访问控制而密文对应于一个属性集合,解密当且仅当属性集合中的属性能够满足此 …
A Key-policy Attribute-based Encryption Scheme with Constant …
WebJul 29, 2024 · kp-abe是密文-》属性集,私钥-》访问结构。属性集满足访问结构才能解出最终的明文。 cp-abe是密文-》访问结构,私钥-》属性集。属性集满足访问结构才能解出最终的明文。这里面的属性集是私钥,包含了数据请求者的属性,用来解访问控制树,最终得到根节点的秘密数s,然后带入公式3解密就能 ... WebIn a key-policy ABE (KP-ABE) scheme, for instance, one can embed an access structure in a secret key such as (Year:1991-2000 AND Category:jazz). The secret key can decrypt ciphertexts that have attributes Year:1991-2000 and Category:jazz but cannot ones that only have at most one of them. Ciphertext-policy ABE (CP-ABE) is a dual of KP-ABE and bnf tolbiac
Enhanced Ciphertext-Policy Attribute-Based Encryption (ECP-ABE…
Web用于判定谁有资格解密这个密文的),使得策略与属性集合相匹配,来达到私密的数据共享。 当前ABE分为两类,即,CP-ABE、KP-ABE。 CP-ABE. 基于密文策略的属性加密,Ciphertext-Policy ABE,CP-ABE。是将策略嵌入到密文中,属性嵌入到用户密钥中。 WebApr 14, 2024 · 当 ebp≌ qcp时,cp=bp,cq=be∴12-4t=4t,解得t=,∴a=4,解得a=(cm/s); 答:经过秒, ebp与 cqp全等;此时点q的速度是cm/s; (3)设经过x秒,点p与点q第一次在长方形abcd的边上相遇; 则:4x=12+x,解得:x=9此时点p运动路程为:4×9=36(cm), ∴点p在ab的中点处,答 ... WebNov 18, 2012 · Attribute-based encryption (ABE) is a new cryptographic primitive which provides a promising tool for addressing the problem of secure and fine-grained data sharing and decentralized access control. Key-policy attribute-based encryption (KP-ABE) is an important class of ABE, where cipher texts are labeled with sets of attributes and private … bnf tool