最近由于偶然原因,接触了CP-ABE(Ciphertext-Policy Attribute-Based Encryption),学了一段时间,觉得挺精妙,记录并分享一下学习心得。 什么是ABE(Attribute-Based Encryption)? 一言以蔽之:这是一种可以实现精准化访问控制功能的基于公钥密码的算法。 ABE 根据访问策略嵌入实体的不同可以分为两种: CP-ABE:将访问策略...
acommunal areas 共同区域[translate] a沉稳,专注 calm, focus;[translate] a首先,我每天早上要背十个单词。积累单词! First, I every day early morning must carry ten words.Accumulation word![translate] aAttribute-Based Encryption 基于归因于的加密[translate]...
上次提到了的一个由来,从那之后,业界大佬继续研究,得到了一种多权威机构的属性基加密。本文的主要内容基于顶会论文TCC 2007年的文章:Multi-authority Attribute Based Encryption Sahai和Waters描述过一个方案(称为SW),在这个方案中,发送方指定一个属性集和一个数字d对消息进行加密,这样当至少拥有d个给定属性的接收方...
本发明提供一种基于属性加密的云计算安全访问控制方法,主要用于解决云计算访问控制结构的安全性和隐私保护性问题,本次发明的目的是在CP-ABE的基础上,提出一种全新的框架MAH-ABE( Multiple and Hierarchical attribute based encryption)访问控制模型,是一种具有等级的分领域多信任机构的ABE安全框架-MAH-ABE.框架不仅按照...
ABE;Ciphertext-policy ABE;Key-policy ABE Definitions An attribute-based encryption scheme is a public key encryption scheme in which users’ private keys and ciphertexts are dependent upon descriptive attributes. Background The concept of attribute-based encryption (ABE) was first introduced by Sahai...
Attribute-based encryption (ABE) is a public-key-based one-to-many encryption that allows users to encrypt and decrypt data based on user attributes. A promising application of ABE is flexible access control of encrypted data stored in the cloud, using access polices and ascribed attributes assoc...
Onlineoffline attribute-basedencryption. [C ] Proc of the In.t Workshop on. Public KeyCryptography. Berlin; Springer, 2014; 293-310.S. Hohenberger and B. Waters. Online/offline attribute-based encryp- tion. In Public-Key Cryptography, volume 8383 of LNCS, pages 293-310. Springer, 2014....
KatsuyukiTakashima MitsubishiElectric BrentWaters TheUniversityofTexasatAustin FunctionalEncryption •Functionalityf(x,y)–specifieswhatwillbelearnedaboutciphertext y x Application Whoshouldbeabletoreadmydata?accesspolicy Attribute-BasedEncryption[SW05]Ciphertexts:associatedwithaccessformulas (AÇB)ÆCSecretKeys...
Being an effective cryptographic system attribute-based encryption (ABE) became hot topic of research among the researchers. ABE is a kind of public key cryptography system. It uses ciphertext and private key of user for the encryption purpose. This scheme hooked up ciphertext with attributes (e...
Attribute-based encryption (ABE) is public key encryption technique that allows users to encrypt and decrypt messages based on user attributes. In a typical implementation, the size of the cipher text is proportional to the number of attributes associated with it and the decryption time is ...