Protect your sensitive data such as credit card numbers or US social security numbers in your tickets. This app will obfuscate all but the last 4 digits. The other numbers will show as an "X". The data is protected in the Ticket Subject and Description The following credit card formats are covered by this app. 4242424242424242 Visa 4000056655665556 Visa (debit) 5555555555554444 Mastercard 2223003122003222 Mastercard (2-series) 5200828282828210 Mastercard (debit) 5105105105105100 Mastercard (prepaid) 378282246310005 American Express 371449635398431 American Express 6011111111111117 Discover 6011000990139424 Discover 30569309025904 Diners Club 38520000023237 Diners Club 3530111333300000 JCB 6200000000000005 UnionPay Disclaimer: This app will mask any data that resembles a credit card/SSN number.