METHOD AND SYSTEM FOR DETERMINING THE PRESENCE OF SIM CARD AND CUSTOMER OF SIP PROTOCOL IN ONE AND THE SAME MOBILE DEVICE

摘要

The present invention relates to a method and system for determining that a SIM card and a SIP client are present in the same mobile device (ME). The SIP server, the SLR register and the mobile device are connected to each other with connectivity. The SIM card is located in the mobile device and has an IMSI number. According to the proposed method and system, a secure module, SLM-SM, which is part of a SIM card, uses a key, encrypts a variable obtained from the IMSI number, and provides the first password parameter as the result of encryption. In addition, the SLM location management module, SLM, contained in the mobile device, receives the security code of the mobile device; performs the "Exclusive OR" operation of the security code of the mobile device and the mobile device identifier and provides the second password parameter as the result of the "Exclusive OR" operation. The SLR register performs a process to control the presence of a SIP client and update location for mobile operators MSISDN, this process includes receiving a second password parameter from the SLM module via the SIP server; decryption of the second parameter of the password using the key; executing an "exclusive OR" result of decryption with an initial number; comparing the result of the "Exclusive OR" operation with the IMSI number and, if they coincide, determining the presence of the SIM card and the SIP client in the same mobile device.