Proxy re-encryption

Cloud computing security

Overhead (engineering)

Computer security

Encryption

Scope (computer science)

Operating system

Attribute-based encryption

Computer science

Cloud computing

Privacy protection

Public-key cryptography

Revocation

Internet privacy

Information privacy

On-the-fly encryption

Access control

Client-side encryption

Programming language

Ciphertext

Journal of Network and Computer Applications

With the development of cloud computing, privacy security issues have become increasingly prominent, which is of concern to industry and academia. We review the research progress on privacy security issues from the perspective of several privacy security protection technologies in cloud computing. First, we introduce some privacy security risks of cloud computing and propose a comprehensive privacy security protection framework. Second, we show and discuss the research progress of several technologies, such as access control; ciphertext policy attribute-based encryption (CP-ABE); key policy attribute-based encryption (KP-ABE); the fine-grain, multi-authority, revocation mechanism; the trace mechanism; proxy re-encryption (PRE); hierarchical encryption; searchable encryption (SE); and multi-tenant, trust, and a combination of multiple technologies, and then compare and analyze the characteristics and application scope of typical schemes. Last, we discuss current challenges and highlight possible future research directions.

Security and privacy protection in cloud computing: Discussions and challenges