1. A computer system for generating role-based access control policies that minimize a risk profile of resulting risk-averse roles and assignments to those risk-averse roles, the computer system comprising: a bus system; a storage device connected to the bus system, wherein the storage device stores computer readable program code; and a processor unit connected to the bus system, wherein the processor unit executes the computer readable program code to generate a user-permission relation from a stored access control policy by extracting users and permissions assigned to each of the users from the stored access control policy, wherein the user-permission relation defines a relationship between the users and their assigned permissions to access secure resources connected to a network to perform their assigned duties, and wherein a permission grants a user assigned to that permission an ability to at least one of read a secure document, write to a secure document, delete a secure document, modify a secure document, access a secure hardware device, access a secure software application, and access a secure network; generate a user-attribute relation by mapping the users to attributes describing each of the users; generate a permission-attribute relation by mapping the permissions to attributes describing each of the permissions; determine a set of risk-averse roles, assignment of the set of risk-averse roles to the users, and assignment of the permissions to the set of risk-averse roles based on applying a risk-optimization function to the generated user-permission relation, the generated user-attribute relation, and the generated permission-attribute relation, wherein a risk-averse role includes a set of users with their assigned permissions to perform their assigned duties on the secure resources and has a level of risk associated with the risk-averse role; generate a role-based access control policy that minimizes a risk profile of the set of risk-averse roles, the assignment of the set of risk-averse roles to the users, and the assignment of the permissions to the set of risk-averse roles; wherein risk of misuse of user-permission assignments in a risk-averse role is calculated based on an aggregation of the attributes describing each of the users and the attributes describing each of the permissions assigned to the risk-averse role, and wherein the attributes describing each of the users used in calculating the risk of misuse of user-permission assignments in the risk-averse role include a security clearance level of a user that corresponds to a security clearance value for the user, and wherein the attributes describing each of the permissions used in calculating the risk of misuse of user-permission assignments in the risk-averse role include a sensitivity level of a permission that defines a level of damage caused by at least one of an abuse and a misuse of the permission by the user; and control the access to the secure resources by the users using the generated role-based access control policy to mitigate the risk to the secure resources.