Data Access Control Based on Blockchain in Medical Cyber Physical Systems

Algorithm 2

User registration.

	Input: attrID, attrName, pwd
	Output: user.setMspId which is the ID of the user in MSP
(1)	FabricUser user getUser (attrID, attrName, pwd);
(2)	RegistrationRequest request newRegistrationRequest (attrID, attrName, pwd);
(3)	request.setSecret (pwd);
(4)	request.addAttribute (new Attribute (”attrID ”));
(5)	request.addAttribute (new Attribute (”attrName ”));
(6)	request.addAttribute (new Attribute (”pwd ”));
(7)	RegistrationRequest request = new
	RegistrationRequest (attribute);
(8)	request.setSecret (pwd);
(9)	if !user.getEnrollmentSecret ().equals(pwd) then
(10)	throw new RuntimeException (” The password is
(11)	abnormal. The password you set is inconsistent
(12)	with the password in the system: yourPWD:”
(13)	+pwd+,” system: ”+user.getEnrollmentSecret ());
(14)	end
(15)	user.setEnrollment (ca.enroll (NAME, pwd));