Balancing Access Control and Privacy for Data Deduplication via Functional Encryption

Table 1

Symbols and notations.

Symbol	Notation
f	Length of a file
b	Length of each file block
	Length of the hash value
N	Number of users participating in key aggregation
K	Total number of bloom filters
L	Length of bloom filter array
Q(n)	Number of common attributes in a user group
n	Number of attributes for an individual user
Hash	Computational cost of performing a hash function
CE_K	Computational cost of performing a key aggregation
Enc	Computational overhead of performing a symmetric encryption
PoW	Computational cost of performing a proof of ownership
Add	Computational cost of performing an addition