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Table 3 Efficiency comparison

From: A practical application of CP-ABE for mobile PHR system: a study on the user accountability

Scheme Encrypt cost Decrypt cost User accountability
Li et al. (2015) 4n + 2 Exp 4n Pair Yes
Tian et al. (2014) (n + 3) Exp + 1 Pair 2n Pair + n Exp No
Ours (2n + 2) Mul (n + 2) Mul + (n + 1)Add Yes