In the cloud environment, resources are shared among all of the servers, users and individuals. So it is difficult for the cloud provider to ensure file security. As a result it is very easy for an intruder to access, misuse and destroy the original form of data. In case of compromise at any cost; entrusting cloud is of no use. A need for \"Practically strong and infeasible to get attacked\" technique becomes vital. The paper presents the file security model which uses the concept of hybrid encryption scheme to meet security needs.