Network safety management method and its system

• Main Authors: CHANG, SHAO-NING, TSENG, HONG-WEI
• Format: Patent
• Language: English
• Published: 11.05.2006
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

This invention relates to a network safety management method and its system. A pre-share key is divided into the user name (UN), and the password (PW) two parts. According to the Internet key exchange (IKE) definition, a key SKEYID is deducted. Furthermore, the key value (HMAC_I) associating the user name and the password is added into the message digest function 5, the initiator then transmits this key value to the responder. Furthermore, the responder calculates the key values of all users in the user information database, and saves the computed result. When the responder receives the user key value (HMAC_I) from the initiator, this received key value is compared with the user key value in information database. According to the compared result, the responder calculates the key value (HMAC_R), and transmits this key value to the initiator. If the comparison result is correct, then the responder and the initiator carry on the session, otherwise it rejects the session.