Abstract:
Cloud computing is a rising area within the
field of Information Technology (IT). It has a
potential for cost savings to the enterprises but the
security risk are also enormous. In cloud
environment, sensitive data or information is
continuously exchanged between all the involved
parties. It has to be protected against unauthorized
accesses. This paper shows an encryption access
control scheme for flexible policy updating in cloud
storage with the help of Ciphertext Policy Attribute-
Based Encryption (CP-ABE).When a data owner who
encrypts data updates his access policy, the
ciphertext is re-encrypted according to new access
policy. The aim of proposed scheme intends to
protect personal health records (PHR) for healthcare
domain. It considers generating a secret token key by
the match level between the old and new access
policies. It intends to give a full control on data
owner and to be strong re-encryption phase and to get a
fine-grained access control.
