A population register is a government database that stores core identity details about residents, typically including names, dates of birth, national identifiers, and address information. In many countries it acts as a trust anchor for civil administration, taxation, healthcare, elections, and digital identity services.
In cyber security, population registers are high-value targets because they link identity data at national scale. If attackers gain access, they can use the records for phishing, impersonation, account takeover, or identity fraud. The combination of a stable identifier and an address can make social engineering much more convincing and can help attackers correlate data across other breached systems. Defenders focus on strong authentication, least-privilege access, comprehensive logging, anomaly detection, and export controls to spot unusual bulk queries or data extraction. Protecting a population register is not only about confidentiality: integrity matters too, because unauthorized changes to identity records can disrupt downstream services and trust.