1. A method for securely providing context sensor data, said method comprising: configuring one or more sensors to provide context data, said context data associated with a mobile device; providing an application programming interface (API) to a sensor driver, said sensor driver configured to control said sensors; providing a trusted execution environment (TEE) operating on said mobile device, said TEE configured to host said sensor driver and restrict control access and data access to said sensor driver and to said sensors; generating a request for said context data through said API, said request generated by an application associated with said mobile device; receiving, by said application, said requested context data and a validity indicator through said API; verifying, by said application, said requested context data based on said validity indicator; and adjusting a policy associated with said application based on said verified context data.