Frequently Asked Questions

What information do i need to be able to create desfire encoding

Requirements for Desfire encoding information.

1: Card master key type (3DES; 3K3DES; AES) and the key itself (can also be generated random).

2: Card Master key configuration:
                a. Master key can be changed later (on/off)
                b. Authentication required for directory access (on/off)
                c. Authentication required for creating / deleting applications (on/off)
                d. Card configuration can be changed later (on/off)

3. One or more applications, for each application the following information is required:
               a. Application ID (3 hexadecimal bytes)
               b. Encryption type (3DES; 3K3DES; AES)
               c. application configuration:
                               1. Master key can be changed later (on/off)
                               2. Authentication required for directory access (on/off)
                               3. Authentication required for creating / deleting applications (on/off)
                               4. Card configuration can be changed later (on/off)
               d: Change key settings
               e: Enable ISO file ID support, If supported:
                               1. Iso file ID
                               2. DF name
               f: Overwrite application if it already exists on card (on/off)
               g: One or more (max 14) keys
               h: One or more files can be added to the application, for each file the following information is required:

1: File number
2: Communication mode (Plain; MAC or Encrypted)
3: File type (Standard data file; Backup file; Value file; Linear record file or Cyclic record file)
4: Read access key
5: Write access key
6: Read/Write access key
7: Change settings access key
8: ISO file ID (if ISO is enabled)
9: File size
10: Specification of data in the file: (Dynamic data; Constant data; Empty space or Card serial number)

3: Card serial number representation (MSB or LSB first)

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Last Updated 2 years ago


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