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Ancillary data describing communications/events (e.g., timestamps, identifiers, routing).

Definition

Metadata describes properties of data or events: timestamps, IP addresses, device IDs, message sizes, routing, and account identifiers. It often remains visible to infrastructure even when content is encrypted end‑to‑end.

In plain English Ancillary data describing communications/events (e.g., timestamps, identifiers, routing).

Why this matters

Why it matters: Metadata supports profiling, traffic analysis, and correlation across services.

Example

Example: Network logs plus message timing can correlate users and infer relationships without reading message content.