EFFICIENT REVOCABLE MULTI-AUTHORITY ATTRIBUTE-BASED ENCRYPTION FOR CLOUD STORAGE

EFFICIENT REVOCABLE MULTI-AUTHORITY ATTRIBUTE-BASED ENCRYPTION FOR CLOUD STORAGE

Attribute-based encryption (ABE) is usually adopted for cloud storage, both for its achievement of fine-grained access control over data, and for its guarantee of data confidentiality. Nevertheless, single-authority attribute-based encryption (SA-ABE) has its obvious drawback in that only one attribute authority can assign the users’ attributes, enabling the data to be shared only within the management domain of the attribute authority, while rendering multiple attribute authorities unable to share the data.sd

ADVANTAGES:11

· Elliptic curve cryptography (ECC), an efficient RMA-ABE scheme is proposed for cloud storage, so that bilinear pairing operations will be no longer needed.11

· We use the linear secret sharing schemes (LSSS) to boost the expressiveness of access policy and add version key to attribute to realize immediate attribute revocation.11