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