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What Are First Seen and Last Seen Dates?

The terms "First Seen" and "Last Seen" are commonly used in cybersecurity and data protection to indicate the timeline of detection and observation of assets, data leaks, or security risks during scanning or monitoring processes.

  • In Asset Exposure,
    • First Seen refers to the date when an asset was initially detected.
    • Last Seen refers to the most recent date the asset was observed during a scan.
  • In the case of a data leak,
    • First Seen marks the date when the data breach or unauthorized access was first identified.
    • Last Seen indicates the most recent scan date when the data leak was still present.
  • For vulnerabilities or security risks,
    • First Seen denotes the date the risk was first discovered.
    • Last Seen shows the latest date it was observed during subsequent scans.

These timestamps help in tracking the persistence and resolution of exposures over time.