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In recent years, smart phones are getting more complex and more powerful. Since smart phones use the same software architecture as in PCs, they are vulnerable to similar classes of security risks such as intrusion and hacking. This project proposes an intrusion detection and prevention for smart phone using cloud services which continuously performs an indepth forensics analysis on the smart phone to detect any misbehaviour such as wrong passwords and intrusion. In case misbehaviour is detected, the proposed engine decides upon and takes optimal response actions to prevent the occurrence of ongoing attacks. Despite the computational and storage resource limitations in smart phone devices, the engine can perform a complete and in-depth analysis on the smart phone and data storage, since all the investigations are carried out on an emulated device in a cloud environment. To address the critical challenge of keeping smart phone secure, cloud services has been proposed to prevent the intrusion and block the attack immediately.