Currently

the most common encryption scheme of cloud computing access control system is CP-ABE

but the conventional CP-ABE encryption did not deal with the issue of user's access permission; data owners only allow the users to read the data but not to write

such kind of coarse access control mechanism is not flexible and low efficiency. To deal with this issue

the paper proposes a Data Access Control scheme with access Permission for Cloud Computing (DACPCC)

it sets permission control keys to encrypt the data in cloud based on CP-ABE; the data owner controls the data's access permission by choosing the permission control keys. The paper illustrates the design details of the proposed scheme

then theoretically proves the security and evaluates the performance through simulated experiments; the results show that DACPCC allows the data owners to control the access permission of the data

and it is safe and more efficient.