The data breach affecting France’s Directorate General of Public Finance (DGFiP) is a reminder of a fundamental reality in cybersecurity: no organization can consider its information system completely immune to compromise.
When an attack manages to bypass the various security measures in place, one critical question arises:
What happens if an attacker manages to access the data anyway?
This is precisely where protecting the data itself becomes essential.
A compromise can go beyond the information system
Today, cybersecurity relies on multiple layers of protection: authentication, access controls, antivirus solutions, EDR, network segmentation, monitoring, and threat detection.
These mechanisms are essential.
However, their primary objective is generally the same: prevent an attacker from gaining access or detect an intrusion as quickly as possible.
But when an attacker manages to bypass these defenses, the consequences can be significant.
In the case of the DGFiP, the compromise notably resulted in unauthorized access to sensitive information.
This situation highlights an important distinction:
protecting access to data is not the same as protecting the data itself.
Detecting an attack is not always enough
An organization may invest heavily in threat detection and incident response.
But between the moment an attacker compromises an account and the moment their activity is detected, significant actions may already have taken place: accessing data, moving through the information system, extracting files, or exfiltrating information.
The question therefore becomes:
How can organizations limit the exploitation of data once a compromise has already occurred?
Encryption provides an additional layer of protection.
Properly encrypted data becomes unreadable without the means required to decrypt it.
As a result, even if an attacker manages to bypass certain security barriers, they should not automatically be able to exploit the information they access.
Encryption as a last line of defense
Encryption does not replace existing cybersecurity measures.
Instead, it provides an additional layer of protection that operates directly at the data level.
The goal is not to claim that every attack can be prevented.
The goal is to ensure that even when an attack succeeds, the data remains protected.
This approach adds another dimension to security strategies:
It is not only about preventing attackers from getting in, but also about making the data unusable if they do.
Who controls the encryption keys?
Encryption also raises another critical question: who controls the keys?
Data is only truly under an organization’s control if that organization maintains control over the encryption keys required to decrypt it.
Data sovereignty therefore depends not only on where data is stored.
It also depends on an organization’s ability to control:
– It’s data;
– It’s encryption keys;
– Who is authorized to access it;
– The conditions under which the data can be decrypted.
Lessons from the DGFiP data breach
The DGFiP incident highlights the fact that an organization’s security cannot rely on a single defensive barrier.
Prevention, detection, and incident response remain essential.
But they should be complemented by protection applied directly to sensitive data.
Because an attack may succeed. The data itself must still remain protected.