Cp-abe与kp-abe的区别
WebNov 21, 2024 · 虽然看起来两者正好互补, 但实际应用差别较大, kp-abe因为密钥和访问结构对应, 反而不如cp-abe的密文与访问结构对应更灵活, 数据访问控制上cp-abe更适用于云 … WebJun 28, 2024 · A CP-ABE System comprises five operations: System Setup, Authority Setup, Key Generation, Encryption, and Decryption. In this CP-ABE scheme [], each user’s private key i.e., decryption key is mapped to a set of attributes representing that user’s permissions.When a ciphertext is encrypted, a set of attributes [] is designated for the …
Cp-abe与kp-abe的区别
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Web密钥策略(kp-abe)将策略嵌入到密钥中,将属性嵌入到密文中。 密文策略(CP-ABE)将策略嵌入密文,将属性嵌入钥匙。 因为这两种方案在结构上有双重关系,所以在方案设计中经常进行类比转移,但它们在具体应用场景上有很大不同。 WebNov 18, 2024 · ABE (Attribute Based Encryption) 是在大約 2000 年左右冒起的新寵。. 基本運作原理,是利用 IBE 的方法,以一堆不同的 attributes 去加密文件。. 而近年有兩大分 …
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 Web2 多源环境信息的隐私感知与动态度量机制研究进展. 泛在网络跨系统信息交换过程面临的隐私问题遍及信息流转的各个环节,故本文拟从多源环境中的隐私感知、度量、隐私保护方案自适应调整、隐私分割与延伸授权这4个方面综述现有的隐私保护机制。
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 ... 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 ...
WebAttribute-based encryption is a generalisation of public-key encryption which enables fine grained access control of encrypted data using authorisation policies.The secret key of a user and the ciphertext are dependent upon attributes (e.g. their email address, the country in which they live, or the kind of subscription they have). In such a system, the decryption …
Web作者:陈晓峰、马建峰、李晖、李进 著 出版社:科学出版社 出版时间:2016-02-00 开本:16开 印刷时间:0000-00-00 页数:174 字数:232 isbn:9787030472168 版次:1 ,购买云计算安全等计算机网络相关商品,欢迎您到孔夫子旧书网 boat renewal registration alabamaWebMay 1, 2013 · In ciphertext policy attribute-based encryption (CP-ABE), each user is associated with a set of attributes and data are encrypted with access policies on attributes. A user is able to decrypt a ciphertext if and only if his attributes satisfy the access policy embedded in the ciphertext. However, key escrow is inherent in ABE systems. boat remote monitoringWebCP-ABE fits naturally with RBAC, whereas KP-ABE not so much. Better analogies can be made if you think of attributes as "tags" of the encrypted object/document, instead of the users. For instance, imagine a confidential document about nuclear weapons which is encrypted under the attributes NUCLEAR and TOPSECRET. clifton park ny movie timesWebIn ciphertext-policy attribute-based encryption (CP-ABE) a user’s private-key is associated with a set of attributes and a ciphertext specifies an access policy over a defined universe of attributes within the system. A user will be ale to decrypt a ciphertext, if and only if his attributes satisfy the policy of the respective ciphertext. boat remote spotlightWebAug 10, 2024 · cp-abe的应用场景一般是公有云上的数据加密存储与细粒度共享; kp-abe的应用场景则更加偏向于付费视频网站、日志加密管理等等。 3.abe的优势 我们以cp-abe为例,举一个简单的例子说明abe相较传统公钥加密算法的优势。 boat removal long island trackid sp-006WebApr 11, 2024 · 属性基加密的思想是让密文和密钥与属性集合和访问结构产生关联,当且仅当属性集合满足访问结构的时候,方能解密成功。. 那么根据这其中两两的对应关系,又可以将属性基加密分为两类,即密钥策略属性基加密(KP-ABE)和密文策略属性基加密(CP-ABE)。. KP ... boat removal long islandWebApr 10, 2024 · zkq 20160118 硕士学位论丈MASTER’STHESIS 图2.3访问结构树不葸图 2.2.2基于密钥策略属性加密0KP-ABE) KP—ABE的核心思想是:密文与属性集相关联,用户私钥与策略树相关联, 只有访问控制策略与属性相匹配,密文才能被正常解密。 boat removal service gardena tracc