This paper presents a model for securing genomic data in the cloud. The proposed model is a four-level defense mechanism
(4ldm) to ensure privacy. Authentication, privacy protection, file encryption, trust behavior of cloud services is modeled for first,
second, third and fourth levels of defense respectively. Each level performs its own duty to ensure data privacy and in case one level
is deceived by illegal means or malign user enters the system, movement will be made to the next level of defence. The next level of
defence will then try to prevent the possible attack until the last level.