1, the security network competition refers to the information security countermeasure technology competition, referred to as "ISCC", which was initiated by an American professor to examine the participants' computer security knowledge and attack and defense technology, and to improve everyone's awareness of information security.

2.CTF(CaptureTheFlag, Chinese) is a form of information security competition in the field of network security, which originated from the DEFCON Global Hacking Conference in 1996 to replace the previous way that hackers competed for technology by launching real attacks on each other. By means of offensive and defensive confrontation and program analysis. The participating teams take the lead in obtaining a string of characters or other contents with a certain format from the competition environment given by the organizer and submit them to the organizer to win points.