[Retracted] IOT and Blockchain-Based Cloud Model for Secure Data Transmission for Smart City

Table 1

Comparison of HIDS and NIDS.

Category	HIDS	NIDS
False positive	Few	A certain amount of
Underreporting	Related to technical level	Related to data processing capabilities (inevitable)
System deployment and maintenance	Regardless of network topology	Related to network topology
Detection rules	A small amount	A lot
Detection features	Event and signal analysis	Feature code analysis
Security strategy	Basic security policy (point policy)	Run security policy (line policy)
Security limitations	All events arriving at the host	Unencrypted in transit and nonconfidential information
Security risks	Violation	Method or means of attack