A security challenge for hackers to train and educate themselves. Usually it is exploiting or defending a vulnerability in a system or application, or gaining or preventing access to a computer system...
"Look bro, you need to pat $50 to get into this war game, but if you manage to crack that db before everyone, $1000 will be yours..."
作者 Neizen 2015年10月20日
Can you define these popular missing words?