| Function | Random masking | Consistent masking | Format-preserving encryption | Input data validation |
|---|---|---|---|---|
| Replace all |
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| Replace first n chars |
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| Replace last n chars |
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| Replace characters between two positions |
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| Replace all letters |
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| Replace all digits |
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| Keep first n digits and replace following ones |
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| Keep last n digits and replace following ones |
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| Keep characters between two positions |
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| Remove first n chars | N/A | N/A | N/A | N/A |
| Remove last n chars | N/A | N/A | N/A | N/A |
| Remove characters between two positions | N/A | N/A | N/A | N/A |