Abstract: As Cloud Computing evolved it created an efficient way of pay per usage model for all the resources available on the network. In spite of its several advantages it has been suffering from the major drawback of providing secure communication. This paper makes an attempt to use Public Key Infrastructure (PKI) and provide secure way of communication among different branches of an organization. Each organization is implemented as a private cloud and the central branch usually where the CEO of the organization works to whom each branch needs to report is implemented as a public cloud together giving a hybrid cloud infrastructure.

Keywords: Public Key Infrastructure (PKI), Security, Hybrid Cloud.