"0day" vs "day0"

Question

"0day" vs "day0"

Both "day0" and "0day" are correct, but they are used in different contexts. "day0" is commonly used in programming to refer to the first day of a process or event, while "0day" is often used in cybersecurity to describe a vulnerability that is exploited before the vendor is aware of it.

Last Updated: March 24, 2024

In cybersecurity, the term "0day" refers to a vulnerability that is exploited by attackers before the software vendor becomes aware of it.

Examples:

The hackers used a 0day exploit to breach the system.
Security researchers are constantly on the lookout for 0day vulnerabilities.

Alternatives:

zero-day
0-day
0-day vulnerability
pre-disclosure vulnerability

The term "day0" is often used in programming to indicate the initial day of a project, event, or process.

Examples:

The team will meet on day0 to kick off the project.
On day0 of the conference, registration will begin at 8:00 AM.

Alternatives:

start day
initial day
day one
day one of the project

Answer 1

0day

This phrase is correct and commonly used in cybersecurity to describe a vulnerability that is exploited before the vendor is aware of it.

Answer 2

day0

This phrase is correct and commonly used in programming contexts to refer to the first day of a process or event.

"0day" vs "day0"

0day

day0

Related Comparisons