Character handling functions

Function	Random masking	Consistent masking	Format-preserving encryption	Input data validation
Replace all	Yes	Yes	Yes	No
Replace the first n characters	Yes	Yes	Yes	No
Replace the last n characters	Yes	Yes	Yes	No
Replace characters between two positions	Yes	Yes	Yes	No
Replace all letters	Yes	Yes	Yes	No
Replace all digits	Yes	Yes	Yes	No
Keep the first n digits and replace following ones	Yes	Yes	Yes	No
Keep the last n digits and replace following ones	Yes	Yes	Yes	No
Keep characters between two positions	Yes	No	No	No
Remove the first n characters	Not applicable	Not applicable	Not applicable	Not applicable
Remove the last n characters	Not applicable	Not applicable	Not applicable	Not applicable
Remove characters between two positions	Not applicable	Not applicable	Not applicable	Not applicable

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