FIELD: radio engineering, communication.
SUBSTANCE: invention relates to methods, machine-readable mediums and devices of determination of necessity in information message encryption. According to the method a device determines an information message contents to be transmitted through the control channel, and the device is a mobile communication device or a network access node containing a base station controller and a base transmitter-receiver station, decision making by the device, whether it is necessary to perform encryption of an information message, on the basis of the named certain content and execution or non-execution of an information message encryption on the basis of the named decision; in case the named certain content represents an information message of short message transmission service, the decision on an information message encryption, and in case the named certain content represent a system information message, the decision is made on refusal on information message encryption is made.
EFFECT: improvement of security of data transmission.
64 cl, 20 dwg
