A Traceable Blockchain-Based Vaccination Record Storage and Sharing System

Table 1

The notations used in this study.

Name	Description
IDX	The identity of X
p	A k-bit prime number
Fp	Finite group of p
E	E the elliptic curve defined on finite group
	a generating point based on E
Ri	The i-th random number based on E
(rX, sX)	The elliptic curve signature key pair for X
(xX, yX)	The ECDSA signature key pair for X
(dX, QX)	(dX, QX) the ECDSA private key and public key for X
H()	One-way hash function
(SKX, PKX)	The private key and public key for X
CX	The ciphertext send by X
Ti	The i-th timestamp
	The threshold for checking the validity of timestamps
MX	The sending message from X
	Encrypt message M with the public key of X
	Decrypt message M with the private key of X
	Verify that X is equal to Y or not
	The name of the vaccination
S	The symptom of the patient
D	The diagnostic result of the patient
VR	The vaccination record
KVR	The primary message of the VR