A Symmetric Key Based Deduplicatable Proof of Storage for Encrypted Data in Cloud Storage Environments

Algorithm 3

Precomputation process for ownership check.

: a ciphertext , a file tag value ,

a master key , the highest challenge

: an expected response array

(1) for in

(2)

(3) for in

(4)

(5)

(6)

(7)

(8)

(9) return