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PINBlock Calculator

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bentham’s gaze
Update in July 2022: The passport machine readable zone (MRZ) calculator now permits gender to be unspecified.
converting from to

Please use the automated test vector button above to generate sample data, or if you prefer, you can fill out the form below and click the individual action buttons to decrypt, convert and encrypt the PIN block. You can copy ready to use test data from the bottom.





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This site is run by Steven Murdoch and hosted by the Information Security Group at University College London. More details about the work we are doing can be found on our information security research blog: Bentham’s Gaze.

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