Nation states, like animal and plant organisms, are constantly bombarded with necessary changes. However, unlike the notched-shell tortoise and other fauna and flora that have evolved the natural adaptations needed to cope in an ever changing environment in order to survive, nation states lack this natural trait. Hence, nations must be artificially spurred to change in order to avert failure.
States become artificially influenced to adapt to modern environments and norms at different rates. Once coping mechanisms have been triggered to facilitate changes and not to prevent them, states are able to enjoy relative lengthy periods of peace and stability. In contrast, states that attempt to block necessary changes are thrown into periods of chaos during which their security - both internal and external, cannot be guaranteed. In other words, change-resisting communities cannot be guaranteed security from internal and external forces once they have denied necessary democratic changes of rights and equality to their people.
With that said, there could be no absolute guarantee of security that the United States(US) or Western Powers could offer such change-resisting states.
Thus, nations seeking guarantees of security in the face of a possible World-Iran nuclear deal, are over reaching their boundaries of demands in attempting to exact guaranteed security from others because of a deal that has not yet been finalized.
However, these nation states should seek to bolster their security cooperativeness with the West as they make concerted efforts to facilitate the modern changes their societies expect, such as allowing women the right to drive an automobile and other changes indicative of the modern era.
The denial of fundamental privileges and rights to the people in any society, stands as an obstacle to adaptation and a weakening of a community making it more prone to influence and agitation from a perceived foe. Therefore, no guarantee of security could ever rightly be assured a non adaptive state.