A Distributed Access Control with Outsourced Computation in Fog Computing

Table 1

The meanings of main symbols.

The symbol	The meaning of each symbol
DA	The generic term of distribute authority
AC	Authority center
	The computing time of a bilinear pair
	The computing time of one scalar multiplication in
	The computing time of exponentiation computation in
	The computing time of general hash function
	The computing time of symmetric encryption
	The number of the attribute that the sender possesses
	Related to the user’s access control structure
	Each distribute authority
n	The number of distribute authority