The DoomsdayYou must be heard a unstoppable killing machine named Doomsday that was successful overcame Superman in the DC's comic. The day at the time of Doomsday defeat Superman was the doomsday, the destruction day of humankind. Like doomsday, 0-Day (Zero-Day) is a doomsday for software developer.


0-Zero Day is a term that was difficult to be proven the existence. Meaning that, the person often named this term, but in practice it was said almost had not been found. Zero-Day that I intention here often was mentioned by Zero-Day (hour) attack/exploit.

In my opinion, not was unknown, but was difficult to be proven that was a zero day attack. The term derives from the age of the exploit. A Zero-Day exploit is almost always unknown to the public and to the software developer, but generally circulate through hackers until finally being released on public forums.

In the other word, A Zero-Day attack is one that takes advantage of a security vulnerabilitZero Day Attacky on the same day that the vulnerability becomes generally known. After someone detects there is a software contains a potential exposure to exploitation. That person can notify the software developer and sometimes the world at large so that action can be taken to repair the exposure or defend against its exploitation. Unfortunately, sometimes had someone who was successful make use of this vulnerability before software developer succeeded in fixing that software.

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