What Should a Company Do After a Data Breach?
Read Time 6 mins | 20 Jun 2026 | Written by: Hastin Lia
Data breaches are one of the most significant threats that organizations can face in today's digital landscape. Exposed data may include customers' personal information, financial records, sensitive business information, and intellectual property. When a data breach occurs, it can result not only in financial losses but also in reputational damage and a loss of trust among customers and business partners. Therefore, a swift and effective response is essential to minimize the negative consequences of a data breach.
This article discusses the steps organizations should take following a data breach, from identifying and securing affected systems to improving security policies and maintaining transparent communication with relevant stakeholders.
Identifying and Verifying a Data Breach
The first step an organization should take after becoming aware of a potential data breach is to identify and verify whether the breach has actually occurred. The incident response team, which should already be established and prepared in advance, must be immediately engaged to conduct an initial investigation. This process is intended to assess the extent of the breach and its impact on the affected data.
The team should also perform a system audit to determine the source of the breach and identify the security vulnerabilities that allowed the data to be exposed. This investigation should include an analysis of the types of data involved and the individuals or entities affected by the breach. For example, if customer data has been compromised, the organization must promptly identify which customers were impacted by the incident.
At this stage, organizations must exercise caution when determining the scope of the breach and ensure that any information communicated to the public is accurate. Mishandling this stage can worsen the situation and increase the damage that has already occurred.
Read: Preventing Data Breaches: Strategies to Avoid Data Leaks
Securing Systems and Preventing Further Damage
Once a data breach has been confirmed, the next step is to secure the affected systems and prevent any further data exposure. This means that the organization must immediately restrict access to the systems or data involved in the breach. The purpose of this action is to ensure that no additional data is compromised.
The organization should also promptly remediate the affected systems, including applying necessary security patches or updates. If the breach was caused by a vulnerability in specific software or systems, this step is critical to closing the security gap and preventing further exploitation.
In addition, it is important to implement enhanced system monitoring. Organizations should increase oversight of all systems and devices involved in the breach. This monitoring is intended to detect any additional threats and prevent further incidents that may occur following the initial breach.
Assessing and Measuring the Impact of a Data Breach
After securing the affected systems, the organization must assess the impact of the data breach. This assessment should cover several key aspects, including the type of data involved, the financial losses incurred, and the impact on the organization's reputation.
First, the organization should evaluate the type of data that has been exposed. If customer data is involved, the organization must understand how sensitive the information is and the potential consequences for the affected individuals. Exposed personal data, such as credit card numbers, health records, or identity information, can result in financial harm to victims and may lead to further issues such as identity theft.
Next, the organization should calculate the financial losses resulting from the data breach. The costs associated with a breach can be substantial and may include recovery expenses, legal costs, regulatory fines, and revenue losses caused by declining customer trust.
Finally, the organization should assess the reputational impact of the breach. An organization's reputation is heavily dependent on customer trust. When customers learn that their data has been compromised, they may choose to move to competitors that are perceived as more secure. Therefore, the organization must develop a strategy to rebuild trust and restore its reputation following the incident.
Notifying Affected Parties
Following a data breach, the next step is to notify the relevant parties, including affected individuals and the appropriate authorities. In Indonesia, organizations that experience a data breach are required to notify customers or users whose data has been affected, in accordance with the provisions of the Personal Data Protection Law. This notification should include information about the type of data exposed, the potential risks involved, and the actions affected individuals can take, such as changing passwords or monitoring their financial accounts for suspicious activity.
In addition, organizations are required to report the breach to the Personal Data Protection Commission (KPDP) if sensitive data is involved, within 72 hours of detecting the incident. This report should include details of the breach, the recovery efforts that have been undertaken, and the measures being implemented to mitigate further impact.
If the data breach is the result of criminal activity, the organization should immediately report the incident to the Indonesian National Police (Polri) or the National Cyber and Crypto Agency (BSSN) to support further investigation and enforcement efforts.
Taking Legal and Compliance Actions
After the data breach has been identified and reported to the relevant parties, the organization should consult with legal counsel to understand the legal rights and obligations arising from the incident. Legal advisors can assist the organization in navigating any legal proceedings that may result from the breach, including claims from affected parties or actions taken by regulatory authorities.
The organization should also prepare an official report regarding the data breach. This report should include information about the incident, the types of data that were exposed, the actions taken to address the breach, and the measures being implemented to prevent similar incidents in the future. Such a report may also be required by regulators or third parties conducting investigations into the breach.
In addition, the organization should be prepared to face potential legal claims. These claims may come from customers who believe they have been harmed by the breach or from regulatory authorities imposing penalties for failing to meet data protection obligations. Therefore, appropriate legal measures should be taken to help protect the organization and ensure compliance with applicable regulations.
Improving Security Policies and Procedures
Following a data breach, the organization should immediately evaluate its existing security policies. This evaluation is important to determine whether the current policies are adequate or require improvement. The organization should assess whether there are gaps in its security policies that may have contributed to the breach.
The organization should update its security policies and procedures to address any weaknesses identified during the audit process. For example, if the breach was caused by inadequate access controls, the organization should strengthen access management for sensitive data and ensure that only authorized individuals are granted access.
In addition, the organization should enhance employee training and awareness regarding the importance of data security. Many data breaches occur as a result of human error, such as clicking on phishing links or using weak passwords. By providing appropriate training and education, organizations can reduce the likelihood of similar incidents occurring in the future.
Communication and Transparency
Effective communication is critical when responding to a data breach. Following an incident, organizations should maintain clear and open communication with both internal and external stakeholders. This includes providing transparent information to customers, business partners, and regulatory authorities about what happened and the steps being taken to address the issue.
This transparency should also be reflected in any public statements or reports provided to the media. By managing communications effectively, organizations can help rebuild trust among customers and business partners. In addition, open communication can help prevent speculation and misinformation that could further damage the organization's reputation.
Taking Preventive Measures for the Future
A data breach should serve as an important lesson for strengthening an organization's security posture in the future. Organizations should develop and implement long-term security strategies aimed at preventing similar incidents from occurring again.
One way to achieve this is by conducting regular penetration testing and security attack simulations. These assessments help organizations evaluate their vulnerabilities and identify potential weaknesses that could be exploited by attackers. In addition, organizations should continuously stay informed about emerging technologies and evolving cyber threats to strengthen their security defenses.
By taking these measures, organizations can build a stronger foundation for protecting their data and reducing the risk of future data breaches.
Read: Reducing Data Breach Risks with SiberMate Technology
Conclusion
A data breach is an incident that can cause significant harm to an organization. Therefore, a rapid, effective, and well-organized response is essential to mitigate the impact of a data breach. Organizations should identify and verify the breach, secure affected systems, notify relevant parties, and take the necessary legal and compliance actions. In addition, organizations should improve their security policies and procedures, maintain transparent communication, and implement preventive measures to reduce the risk of future incidents.
With the right response and remediation efforts, organizations can minimize the damage caused by a data breach and rebuild trust among customers, partners, and other stakeholders.
