Patent ID: 7561693
Filing Date: 2009-07-14
Classification: H04L,H04W

Abstract:
1. A method for automatically entering into a secure communication mode in a wireless communication terminal, comprising the steps of: a) storing a voice signal outputted from a vocoder of the wireless communication terminal for a predetermined time; b) selecting at least one of the voice signal values among which the occurrence of generation is lower than a threshold value to generate a token header data; c) combining token header data of variable lengths to form a token header and generating a token including the token header, the token header data having the lowest occurrence of generation among voice data outputted from the vocoder of the wireless communication terminal; d) at a transmission terminal, receiving a request for a secure communication from a user and transmitting the token to a reception terminal; and e) at the transmission terminal, entering into a secure communication mode based on an acknowledge token received from the reception terminal, and performing secure communication with the reception terminal.