unit 10 controls the overall operation of the mobile communication terminal 110 according to the present invention depending on a program stored in the storage unit 20 in particular in accordance with the present invention the control unit 10 includes a message reception detection unit 11 an authentication message determination unit 12 a verification information detection unit 13 a source checking unit 14 and a legitimate authentication message determination unit 15 and is configured to determine whether the source of a received authentication message is a legitimate source and if it is determined that the source of the received authentication message is legitimate display the authentication message on the display unit 30 whereas if it is determined that the authentication message is not legitimate display information indicating that the authentication message is a pharming message or a smishing message on the display unit 30 and then delete the authentication message more specifically the message reception detection unit 11 monitors whether an sms message has been received through the mobile communication network 352 and if the sms message is received hooks the sms message stores the sms message in the temporary area or the data area of the storage unit 20 without displaying the sms message on the display unit 30 and provides it to the authentication message determination unit 12 the authentication message determination unit 12 determines whether an sms message has been received via the message reception detection unit 11 analyzes the content of the sms message determines whether the sms message is a normal authentication message or an authentication message requiring authentication such as a.