SECAI Core · phase 11 of 15 · noun
Reconnaissance
The actions taken to gather information about an individual or organization's computer systems and software.
The Explain card
- Plain English
- Reconnaissance is the information-gathering phase before an attack: learning what systems, software, people, and exposures a target has, often quietly and from public sources.
- Example
- Before attacking a company's chatbot, an attacker reads its job postings to learn which LLM vendor and vector database it uses, then probes the API for version strings and error messages.
- Why it matters
- Every leaked detail, from model names in responses to verbose stack traces, shortens the attacker's path. Defenders reduce the footprint and watch for probing behavior.
- Hook
- Casing the joint before the heist.
Word knowledge
How the word is built, where it came from, and what it sits beside in memory.
In a sentence
Before testing the model-serving cluster, the security team performed reconnaissance by mapping public API endpoints, DNS records, and exposed software versions.
How it is built
- re- prefix again or back
- connaiss- French stem know or recognize
- -ance suffix action, process, or state
Where it came from
- Origin
- French reconnaissance, from reconnaître, meaning to recognize or inspect
- Entered the language
- 1810
- What changed
- It moved from recognition and inspection to military surveying, then to preparatory intelligence work in fields such as cybersecurity.
How it is spelled
- Pattern
- The French-derived ending -aissance keeps ai before double s and ends with a silent e.
- Breaks the pattern
- The written sequence -aissance is pronounced with reduced vowels that are not predictable from ordinary English spelling.
Spelled like
- renaissance
- naissance
Broken into chunks
-
recon
- recon
- reconnoiter
-
naissance
- naissance
- renaissance
What it sits beside
Same subject
- attack surface
- vulnerability scanning
- threat intelligence
- penetration testing
Same shape
- renaissance
- naissance
security assessment stages
- reconnaissance
- scanning
- exploitation
French-derived English nouns
- reconnaissance
- surveillance
- renaissance
Where it sits in the deck
Phase 11: Threat Landscape: Attack Vectors and Adversarial Techniques
With defences named, learn what they must defend against — the full catalogue of attack techniques targeting AI systems, their inputs, outputs, training pipelines, and supply chains.
