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fluent-plugin-pan-anonymizer

A Fluent filter plugin to anonymize records which have PAN (Primary Account Number = Credit card number). The plugin validates PAN using Luhn algorithm after matching.

Inspired by fluent-plugin-anonymizer.

Requirements

  • fluentd: v0.14.x or later
  • Ruby: 2.4 or later

Installation

gem install fluent-plugin-pan-anonymizer

Configuration

NOTE: Card numbers in the example don't exist in the world.

<source>
  @type dummy
  tag dummy
  dummy [
    {"time": 12345678901234567, "subject": "xxxxxx", "user_inquiry": "hi, my card number is 4019249331712145 !"},
    {"time": 12345678901234568, "subject": "xxxxxx", "user_inquiry": "hello inquiry code is 4567890123456789"},
    {"time": 12345678901234569, "subject": "I am 4019 2493 3171 2145", "user_inquiry": "4019-2493-3171-2145 is my number"},
    {"time": 14019249331712145, "subject": "ユーザーです", "user_inquiry": "４０１９２４９３３１７１２１４５ のカードを使っています"}
  ]
</source>

<filter **>
  @type pan_anonymizer
  ignore_keys time
  <pan>
    formats /4\d{15}/, /４[０-９]{15}/
    checksum_algorithm luhn
    mask 9999999999999999
  </pan>
  <pan>
    formats /4\d{3}-\d{4}-\d{4}-\d{4}/, /4\d{3}\s*\d{4}\s*\d{4}\s*\d{4}/
    checksum_algorithm luhn
    mask xxxx-xxxx-xxxx-xxxx
  </pan>
</filter>

<match **>
  @type stdout
</match>

The result of the example given above

2018-11-13 22:01:35.074963000 +0900 dummy: {"time":12345678901234567,"subject":"xxxxxx","user_inquiry":"hi, my card number is 9999999999999999 !"}
2018-11-13 22:01:36.001053000 +0900 dummy: {"time":12345678901234568,"subject":"xxxxxx","user_inquiry":"hello inquiry code is 4567890123456789"}
2018-11-13 22:01:37.021032000 +0900 dummy: {"time":12345678901234569,"subject":"I am xxxx-xxxx-xxxx-xxxx","user_inquiry":"xxxx-xxxx-xxxx-xxxx is my number"}
2018-11-13 22:01:38.050578000 +0900 dummy: {"time":14019249331712145,"subject":"ユーザーです","user_inquiry":"9999999999999999 のカードを使っています"}

Card numbers were masked with given configuration except time key and 4567890123456789 in "hello inquiry code is 4567890123456789". 4567890123456789 is not a valid card number.

License

Apache License, Version 2.0