The security of mobile applications may be assessed and used to enhance the security of mobile devices. In one example, a method may include determining security scores of one or more mobile applications, the security scores defining a level of security risk corresponding to the one or more mobile applications. The method may further include receiving a policy relating to mobile applications that are permitted to be used by the mobile device, the policy including a threshold security score value; and receiving the requested security scores. The method may further include restricting use of selected ones of the one or more mobile applications when a security score corresponding to the one or more mobile applications is below the threshold security score value.