Chapter 6 – Test Tools
Data Masking – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A method of creating a structurally similar but inauthentic version of data. The purpose of data masking is to protect sensitive data while providing a functional substitute.
In simple words
Take real data and scramble the sensitive bits (names, SSNs) so the shape is real but the values are fake.
Exam tip
Data masking is the fastest way to make a prod snapshot safe for lower environments.
Related terms
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