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Credit Card masking functions

You can mask valid credit card numbers.
Function Random masking Consistent masking Format-preserving encryption Input data validation
Mask Credit Card and keep bank No No Yes Yes
Mask Credit Card No No Yes Yes
These functions:
  • Apply on String values.
  • Support all credit card types.
  • Keep the original format of the credit card number. For example, if the input has 13 digits, the output has 13 digits.

A credit card number is considered invalid when it does not satisfy the Luhn algorithm.

If the input is an invalid credit card number and there is:
  • No "Invalid" output flow, the function returns null in the main flow.
  • An "Invalid" output flow, the corresponding data are sent to the "Invalid" output flow.

Mask Credit Card and keep bank

This function masks valid credit card numbers and keeps the Bank Identification Number/Issuer Identification Number (BIN/IIN). The output value is a valid credit card number.
This function:
  • Keeps the first six digits.
  • Masks the other digits.
  • Generates the last digit using the Luhn algorithm.

Two methods are available: FF1 with AES and FF1 with SHA-2. This function requires no alphabet and no extra parameter.

In the following example, the Keep format check box is selected to preserve the space from the input value.

Credit card number Method Example of masked value

4570 5624 6978 6793

 FF1 with AES

4570 5678 2786 4430

374140537770721

 FF1 with AES

374140100455098

5168690988613241

 FF1 with SHA-2

5168699616108078

5158495805899854

 FF1 with SHA-2

5158494455420285
0123 4567 8987 6543 210 FF1 with AES null

Mask Credit Card

This function masks valid credit card numbers. The output value is a valid credit card number.
This function:
  • Masks all digits.
  • Generates the last digit using the Luhn algorithm.

Two methods are available: FF1 with AES and FF1 with SHA-2. This function requires no alphabet and no extra parameter.

In the following example, the Keep format check box is selected to preserve the space from the input value.

Credit card number Method Example of masked value

4570 5624 6978 6793

 FF1 with AES

4931 3744 4754 2072

374140537770721

 FF1 with AES

749381687018333

5168690988613241

 FF1 with SHA-2

4138106541683084

5158495805899854

 FF1 with SHA-2

9641013768742255
0123 4567 8987 6543 210 FF1 with AES null

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