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"DFN"

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Diagram of chip card file structure showing MF, DF, and EF layers

EMV

What is Dedicated File Name (DFN)?

DFN is the abbreviation for Dedicated File Name. It defines the name of the DF (Dedicated File) as described in ISO/IEC 7816-4. It is the data found in Tag 84, 5 to 16 characters in length.