S.No Propagation Model Result Advantages Disadvantages
1 Anti-virus Trust level Healthy-Danger-Infected (ATHDI) Improved model that includes anti-virus program and trust- level of user More factors are considered for propagation analysis Impossible to detect the presence of email before the receivers receive the email
2 Susceptible-Exposed-Infectious-Recovered Virus propagation is  faster while  users  login  in  their accounts more frequently. Indicate the effects of the networks and users on SNS network. Assess of the anti-virus strategy is low.
3 ACT Scheme Propagation of the virus in the network is controlled by identifying the existence of the transmission chain in the network. It uses the contact list tracing to find the epidemiological links between host Limited to single enterprise, where it is possible to collect all necessary traffic information in a casual chain.
4 Susceptible-Infected- Removed (SIR) Dynamic propagation of email virus was approximated for homogeneous network. Used in email and social network. Not suitable for heterogeneous network.
5 Susceptible-Infected- Immunized (SII) This model is able to address two critical processes such as reinfection and self-start that   is   unsolved   in   the previous models. Avoid systems threats before infected by virus. Independent assumption and periodic assumption are unsolved problems
Table 1: Comparison of various propagation models.