  In Ciphertext-Policy Attribute Based Encryption (CP-ABE), attributes are
attached to the user's secret key and access policy is at-tached to the
ciphertext. If attributes in the secret key of a user satisfy the policy then
only the genuine user can decrypt the ciphertext. However, such scenario also
necessitates periodic updating of the secret key with the changing attributes.
According to our observations, the existing attempts at doing so are not
efficient. In this paper, we propose a newer approach to add, update or delete
the value of particular attribute effi-ciently without the knowledge of the
other attributes.
