The invention belongs to the technical field of
fog computing and
information security, and discloses a block-
level data de-duplication method for supporting dynamic ownership management in
fog storage. The method provides an improved block-level
client de-duplication technology, and solves the problem of data sensitive information revealing of the current block-level
client during de-duplicationwhile saving network bandwidth. The method also provides a secondary ownership
list and a key update mechanism, can realize the
access control of
fine grain at a lower cost while effectively saving storage space, and fills up the blank of no compatibility between ownership management technologies and the block-level
client de-duplication technologies. In addition, the method also introduces a datablock
dynamic storage mechanism, data blocks in a
system can be transferred in the
system according to service needs, and therefore, service costs and file access
delay can be reduced,
system security and user
service experience can be enhanced, and the problem of low system
resource utilization rates in a current
fog storage de-duplication scheme can be solved.