The advent of cloud computing and storage provides numerous opportunities for better management of resources, with the potential of drastically reducing costs. However, when data is outsourced to the cloud, new security vulnerabilities emerge, as the cloud provider (and its employees) are normally not completely trusted by the party that is outsourcing the data. Therefore additional security mechanisms are needed in order to prevent against internal attacks in the cloud provider. Nonetheless, the performance and functionality should be impacted as less as possible. This work presents a database adapter for the secure outsourcing of data that aims at achieving a good performance-security trade-off.