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:将访问策略嵌入密文 KP-ABE:将访问策略嵌入密钥 KP-ABE机制更适用于用户数量较少、但需要高度灵活性的场景;而CP-ABE机制则更适用于用户数量较多...
Attribute-Based Encryption (ABE) is a cryptographic solution to protect resources in a fine-grained manner based on a set of public attributes. This is similar to attribute-based access control schemes in the sense that both rely on public attributes and access control policies to grant access ...
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，符合属性的用户仅需一次加密即可解密，如文件只能部门领导或组长访问，属性设为{role:...
The concept of attribute-based encryption (ABE) was first introduced by Sahai and Waters in 2005 (Sahai and Waters,2005). ABE was later categorized into two types (Goyal et al.,2006): ciphertext-policy ABE (CP-ABE) and key-policy ABE (KP-ABE). In CP-ABE, each ciphertext is associat...
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...
As a new public key primitive, attribute-based encryption (ABE) is envisioned to be a promising tool for implementing fine-grained access control. To further address the concern of user access privacy, privacy-aware ABE schemes are being developed to achieve hidden access policy recently. For the...
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...
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
Attribute-Based Encryption (ABE) offers fine-grained decryption policy such that users can do decryption if their attributes satisfy the policy. Such flexibility enables it applicable in various applications in government and business. However, there are
we enrich the available tools in fine-grained cryptography by proposing thefirstfine-grained secure attribute-based encryption (ABE) scheme. Our construction is adaptively secure under the widely accepted worst-case assumption,NC1⊊⊕L/poly, and it is presented in a generic manner using the notion...