Both “cybersecurity” and “cyber security” are grammatically correct and refer to the same thing: the practice of protecting information systems, networks, and data from unauthorized access, use, disclosure, disruption, modification, or destruction.
Here’s a breakdown of the preferences:
- American English: Tends to favor “cybersecurity” as one word. This is reflected in major dictionaries like Merriam-Webster and the Associated Press style guide.
- British English: Leans more towards “cyber security” as two separate words.
So, it depends on the context and your audience. If you’re unsure, “cybersecurity” is a generally safe bet.