Methods and apparatus, including computer program products, are provided for resuming connections. In some example embodiments, there may be provided a method that includes receiving, at a user equipment, a radio resource control connection resume message; verifying, at the user equipment, an integrity of the received radio resource control connection resume message, wherein the user equipment verifies the integrity based on a predetermined value of a packet data convergence protocol hyper frame number; and resuming, by the user equipment, use of a suspended radio resource control connection, when the integrity verification of the received radio resource connection resume message is passed successfully. Related systems, methods, and articles of manufacture are also described.