Taking full advantage of the availability of Cloud computing facilities, Mobile Cloud Computing (MCC) is becoming more and more popular as an element of mobile technology. This availability enables mobile users to use the cloud infrastructure to overcome the limitations of mobile technology; namely limited data storage, processing power and battery life. With the increasing use of mobile cloud computing, security issues remain a challenge. This paper investigates some available trusted platforms in order to pinpoint the question on how to secure the MCC under trusted platforms. This investigation comprises an overview of the security aspects of Trusted Platforms including Secure Elements (SE), Host Card Emulation (HCE), Trusted Execution Environment (TEE), and Trusted Platform Module (TPM). In addition, it shows how these platforms can be suitable for securing mobile Cloud computing.