Zero-day

Back then, having "zero day warez" (brand new cracked games that are not even one day old yet) on your BBS first was a big status symbol.

If your software is popular and has a high demand, you will want to defend against the "zero-day" cracker.

Before discussing ways to counter zero-day attacks, let's begin with the definition of what a zero-day attack is. A zero-day attack is one that the vendor does not yet know about or hasn't been fixed.

2005, Valdes et al, Recent Advances in Intrusion Detection Automatically creating reliable signatures of zero-day exploits is the focus of intense research efforts.

Average residues of 1.44 and 2.18 mg/kg chlortetracycline were seen in liver and kidney, respectively, at zero-day withdrawal.

New Internet Explorer zero-day exploited in Hong Kong attacks

These days, however, more zero days are being used and discovered.

All the four zero-days originally were reported to Microsoft, affecting Internet Explorer on the desktop.