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Backup is the process of creating copies of data to use in the event the original data is lost or corrupted. In the realm of information security, backup acts as a critical safety measure, ensuring that information can be restored and operations can continue following incidents like data breaches, malware attacks, accidental deletions, or catastrophic hardware failures.

Effective backup strategies involve regularly saving data to secure locations, which can be on-site, off-site, or in cloud-based storage systems, depending on security requirements and recovery objectives. This practice aligns with the concept of redundancy, a key principle in cybersecurity that protects against data loss and contributes to a robust disaster recovery plan. Backups can be full, incremental, or differential, with each methodology offering a balance between resource investment and recovery capability.

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Enterprise data backup platform Commvault has revealed that an unknown nation-state threat actor breached its Microsoft Azure environment by exploiting CVE-2025-3928 but emphasized there is no evidence of unauthorized data access