Universal containers want to build a custom mobile app connecting to salesforce using Oauth, and...

 TheOAuth feature of Salesforce that should be used to restrict the types of resources mobile users can access is scopes. Scopes are parameters that specify the level of access that the mobile app requests from Salesforce when it obtains an OAuth token. Scopescan be used to limit the access to certain resources or actions, such as API calls, full access, web access, or refresh token. By configuring scopes in the connected app settings, Universal Containers can control what the mobile app can do with the OAuthtoken and protect against unauthorized or excessive access.