The use of cloud computing is growing by 2016, this growth will increase to become the bullk of new IT spend. Companies are interested in outsourcing security service to Cloud providers in order to reduce management and deployment costs. This outsourcing addresses many problems related to identification, authentication, secure data transfer, and privacy in Security As A Service (SECAAS)Model. Our article presents a secure, strong and efficient authentication architecture and identity management for cloud based firewalling service using EAP-TLS smart cards technology.