Securing Data in Cloud by Time Based Encryption

Abstract

Data to be shared in the cloud faces many challenges in security. Cloud computing is chosen for this purpose as it reduces cost for data management and its available resources. It is necessary to have an efficient data access control to protect data from third party cloud server. Cipher text-Policy Attribute-based Encryption is used for data security in the cloud. A time access control is very important while sharing data on the cloud. The encrypted data is uploaded by the data owners with a time limit so that other users cannot access the data beyond that corresponding limit.