The scope of this paper is to present the necessity to improve the existent ambient intelligence model with respect to data security. The security of such a model poses a great challenge due to the fact that different networks are mixing in order to provide such an environment. In addition, these networks are generally deployed and then left unattended. All these aspects joined together make it unfeasible to directly apply the traditional security mechanisms. Therefore, there is a need to analyze and better understand the security requirements of these networks. This paper provides the specific security attacks to such a model and supplies a solution for these attacks.