Supply chain management (SCM) is the set of assignments required to plan, control and execute a product's flow from raw materials to production & final production to distribution in efficiently with more economical way possible. Nowadays, the companies are tried to expand the SCM working flows smoothly using modern internet based technology in real time. Hence the various security issues may arise in SCM environment due to the increase of communication between two parties like business to business or business to customer via internet. Secure authentication environment is needed to mitigate the risks regarding SCM communities. However, this paper represents the process framework of SCM and its components. It also focuses the security issues in respect of shared information through network and their possible countermeasures.