Multilevel security is a security policy that allows you to classify objects and users based on a system of hierarchical security levels and a system of non-hierarchical security categories.
Multilevel security provides the capability to prevent unauthorized users from accessing information at a higher classification than their authorization, and prevents users from declassifying information.
Data Flow in Multilevel Security :
Assume that the security is classified into three levels - Top Secret, Secret and Confidential. In multilevel Security data can flow between the levels, for example between "Secret" to "Secret", or from a lower level to a higher level. This means that users at level "Secret" can share data with one another, and can also retrieve information from Confidential-level (i.e., lower-level), users. However, data cannot flow from a higher level to a lower level. This prevents processes at the "Secret" level from viewing information classified as "Top Secret". It also prevents processes at a higher level from accidentally writing information to a lower level. This is referred to as the "no read up, no write down" model.
IGNOU Assignment Solution
IGNOU Question Paper Solution
WHAT WE DO
Provide BCA, MCA Projects
Provide Assignment & Question Paper Solution