Flexible, Secure, and Reliable Data Sharing Service Based on Collaboration in Multicloud Environment

Algorithm 1

Upload().

Input: the outsourced data file collection ; the encryption key collection ; the secret binary number .

Output: the encrypted data/key blocks that should be outsourced to multi-cloud alliance.

  (1) for each data file in   do

  (2) the owner encode it with - RS code:

  (3) for each data block in   do

  (4) the owner encrypts it with :

  (5) end for

  (6) end for

  (7) for each encryption (decryption) key in   do

  (8) the owner splits as isometric binary number:

  (9) the owner encode it with - RS code:

  (10) for each key block in   do

  (11) the owner encrypts it with :

  (12) end for

  (13) end for

  (14) return