<p><span style=\"font-family: \'Times New Roman\'; font-size: medium;\">Cloud Computing is arguably one of the most discussed information technology topics in recent times. It shows many promising technological and economical opportunities. Information is shared among the persons in private, public cloud system who are in that cloud. Due to this technique, security &amp; personal information hiding process is destroyed. We have proposed a network security model for cloud computing which ensures to give you secure communication &amp; maintain the privacy of information. This model includes AES based file encryption system, key system for information exchange &amp; is applied with PaaS, SaaS &amp; IaaS i.e. main cloud computing features. The main feature added to this model is biometrics which is used to authenticate user through vein recognition system.</span></p>