Efficient Privacy-Preserving Access Control Scheme in Electronic Health Records System

. 2018 Oct 18;18(10):3520. doi: 10.3390/s18103520

Algorithm 2 Lookup

(y)

f = fingerprint (y)

;

i_{1} = H_{4} (x)

;

i_{2} = i_{1} \oplus H_{4} (x)

;
If bucket

[i_{1}]

or bucket

[i_{2}]

has f then
return True;
else
return False;
End If.