Which describes a security breach notification procedure?

Notifying the IDACS security auditors is the correct description of a security breach notification procedure. This process is essential for ensuring that appropriate authorities are informed of any security incidents, allowing for a proper investigation and response. By alerting security auditors, the organization can begin to assess the situation, understand the implications of the breach, and take the necessary steps to mitigate the risk and prevent future incidents.

This procedure is crucial because it aligns with protocols for maintaining security and privacy standards. The involvement of security auditors ensures that the breach is managed according to legal and organizational policies, and helps to uphold accountability within the system.

The other options, while possibly relevant actions in a broader context of incident response, do not specifically describe the formal procedure typically associated with security breach notifications as recognized in most security frameworks. These include immediate public notification, which could lead to misinformation or panic, removing all access to the system which may not be feasible or necessary, and documenting the incident in a user's personal file which may not capture the broader implications required in such a serious situation.