---
type: "term"
title: "Availability (Data Risk Event)"
description: "The technical state in which data or resources exist and can be reached by the infrastructure."
resource: "tlctc:term:availability-data-risk-event"
tags:
  - "glossary"
---
# Availability (Data Risk Event)

The technical state in which data or resources exist and can be reached by the infrastructure. Availability answers the question: "Does the data exist and can the system access it?" A resource is available if it is present, can be enumerated, and is technically accessible to the system—regardless of whether it can be meaningfully used. For example, encrypted files remain available (they exist on disk) even when rendered unusable by ransomware. Loss of Availability occurs when data is deleted, storage fails, or systems go offline. DRE notation: `Av` when distinguished from Accessibility, or `A` as general shorthand covering both.