Cloud computing adoption is faced with a number of challenges, these challenges are: security challenges, legal and compliance challenges and organisational challenges. Linked to all these challenges is the issue of trust between clients and vendors, because cloud computing calls for organisations to trust vendors with the management of their IT resources and data. Trust being a critical factor in cloud computing adoption. Of all the challenges security has received more mention. This is because “security is both a feeling and a reality. And they are not the same.” This means that the reality of security is tied to the probability of different risks and how effective are the strategies to mitigate the perceived risks are. Security is also a feeling in that; it is based on the psychological reactions to both the risks and the countermeasures. Therefore, Cloud computing needs to appeal to both the feelings of the potential customers and address the reality of the risks associated with cloud computing in a way that customers will feel safe and secure to use cloud computing. This is what this project calls building customer trust. That is, the ability of cloud computing to appeal to both the feelings of potential customers and the reality of the security risks of cloud computing in a way that customers will feel safe and secure to use it.