Enhancing Transaction Security for Handling Accountability in Electronic Health Records

Table 4

Abbreviations and definition of symbols used in the existing and proposed protocols.

Symbol	Definition	Bits
CID/HCPID/PID/IDS/Cj/IDi	Consumer/healthcare professionals/patient and health authority identity	80
Ti, Ts	Timestamp	64
H/Hash(d)/H(.)/H()	Hash	160
{}Pub/Pub/PKEk(p)//	Public key	128
{}Pri/Pri/PKE (p)//	Private key	128
SK/SKEk(p)/Signk(d)/KS/	Session key	128
PHR/D(i)/Doc	Personal health records	1024
Allow	Message allowed from the patient	5
ReqPHR/m	Request using patient health records	6
Nonce	An arbitrary number that can be used just once	128