Data loss prevention (DLP) tools are meant to stop sensitive data from leaving an organization, but a new survey from the Cloud Security Alliance suggests they often fail at that critical moment. Among respondents who reported experiencing data loss, only 16% said their DLP blocked their most significant incident before the data actually left the organization.
The findings indicate that DLP is more likely to detect data loss after the fact than to prevent it. That shifts the tool's role from a preventive control to a forensic one, potentially leaving organizations exposed to exfiltration until after damage is done.
The survey points to a clear gap between what DLP promises and what it delivers in practice. For security teams, the takeaway is that DLP alone should not be relied upon as the last line of defense against data exfiltration.