F-53 Security Related Control Information (DUKPT)
Description
This field contains the Key Security Numbers (including the transaction counter) used to derive the DUKPT keys used for encrypting/protecting/translating sensitive data (such as cardholder data, PIN data, MAC, etc) to be protected by DUKPT. This field is only required for DUKPT P2PE messages when F-60 Security Data subfield Encryption Mode identifies the mode of encryption as DUKPT.
This is a binary field, of length 30 bytes. Subfields must appear in the order detailed below.
Attributes
b 30
Format
Subfield | Description | Positions | Attribute | Conditions |
Data Key Security Number | KSN for the Data key (used for MAC generation/verification) | 1 - 10 | b 10 | 10 |
P2PE Key Security Number | KSN for the P2PE key (used for protecting cardholder data) | 11 - 20 | b 10 | 10 |
PIN Key Security Number | KSN for the PIN key (used for protecting PIN data) | 21 - 30 | b 10 | 10 |
This field is a Deviation from ISO8583 standard (attribute).
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- F-53 Security Related Control Information (DUKPT)