Fine Grained Access Control下载

weixin_39821260 2019-07-20 08:00:28

Fine Grained Access Control
Arup Nanda, Proligence, Inc.
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Fine Grained Access Control Arup Nanda, Proligence, Inc.

Predicate Fully Homomorphic Encryption: Achieving Fine-grained Access Control over Manipulable Ciphertext

Abstract—Cloud computing is an emerging computing paradigm in which resources of the computing infrastructure are provided as services over the Internet. Promising as it is, this paradigm also brings forth many new challenges for data security and access control when users outsource sensitive data for sharing on cloud servers, which are not within the same trust domain of data owners. To keep sensitive user data confidential from untrusted servers, existing work usually apply cryptographic methods by disclosing data decryption keys only to authorized users. However, in doing so, these solutions inevitably introduce heavy computation overhead on the data owner for key distribution and data management when fine-grained data access control is desired, and thus do not scale well. The problem of simultaneously achieving fine-grainedness, scalability, and data confidentiality of access control actually still remains unresolved. This paper addresses this challenging open issue by, on the one hand, defining and enforcing access policies based on data attributes, and, on the other hand, allowing the data owner to delegate most of the computation tasks involved in finegrained data access control to untrusted cloud servers without disclosing the underlying plaintexts. We achieve this goal by exploiting and uniquely combining techniques of attribute-based encryption (ABE), proxy re-encryption, and lazy re-encryption. Our proposed scheme also has salient properties of user access privilege confidentiality and user secret key accountability. Extensive analysis shows that our proposed scheme is highly efficient and provably secure under existing security models.

Combined access control model embedding configurable policy for fine-grained data security

WSO2 Identity Server 文档 WSO2 Identity Server provides secure identity management for enterprise web applications, services, and APIs by managing identity and entitlements of the users securely and efficiently. The Identity Server enables enterprise architects and developers to reduce identity provisioning time, guarantee secure online interactions, and deliver a reduced single sign-on environment. The WSO2 Identity Server decreases the identity management and entitlement management administration burden by including the role-based access control (RBAC) convention, fine-grained policy-based access control, and Single-Sign-On (SSO) bridging

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