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How can I be certain that the information or communication between the card and reader is not intercepted in a contactless application?

April 26, 2017application card certain communication contactless intercepted reader

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How can I be certain that the information or communication between the card and reader is not intercepted in a contactless application?

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While you may never be able to be absolutely certain of this you can certainly provide a high level of security by utilizing the encryption capabilities of the respective contactless provider. If you are concerned about the data integrity and security of a particular application you will want to require that the data be encrypted, or that the reader employs the use of digital signatures or message authorization coding (MAC).