EFFICIENT MULTI-AUTHORITY ATTRIBUTE-BASED SIGNCRYPTION WITH CONSTANT-SIZE CIPHER-TEXT

EFFICIENT MULTI-AUTHORITY ATTRIBUTE-BASED SIGNCRYPTION WITH CONSTANT-SIZE CIPHER-TEXT

Recently, efficient fine-grained access mechanism has been studied as a main concern in cloud storage area for several years. Sd Attribute-based signcryption (ABSC) which is logical combination of attribute-based encryption (ABE) and attribute-based signature (ABS), can provide confidentiality, authenticity for sensitive data and anonymous authentication. At the same time it is more efficient than previous “encrypt-then-sign” and “sign-then-encrypt” patterns. sdf

EXISTING SYSTEM:

sd In the Existing system is in cloud computing, users store their data files in cloud servers. Thus, it is crucial to prevent unauthorized access to these resources and realize secure resource sharing. In traditional access control methods,s we generally assume data owners and the storage server are in the same secure domain and the server is fully trusted. dfkj