You said that white box is a test design technique. Is that correct?

White box — this is not a test design technique, but an approach to testing where the tester has access to the internal structure, code, or logic of the application. Test design techniques are specific methods for creating test cases (for example, boundary values, equivalence partitioning, state transitions). White box testing uses knowledge of the internal workings of the system to select tests, such as code coverage, condition checking, and loop testing. Therefore, white box is more of a testing strategy or method rather than a test design technique.