Try to use FORMATFPE1EXT to mask data, but a large number of values are not masked,
1. This can happen depends on the chosen key.
Should try another key.
For example, using following key for the same data,
11223344556677889900AABBCCDDEEFF
It works fine,
2. Another reason is due to the duplicated values, the FORMATFPE1EXT is ideal for masking unique columns or fields, if duplication is not a concern, then we can enable "Tweak", for example,
- without "Tweak"
- enable "Tweak"