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Command: |
Verify a PIN using the Diebold algorithm and generate Auth Para at the Card Issuer. |
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Notes: |
The command enables a Card Issuer to recover an encrypted PIN block sent by the Acquirer. |
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Field |
Length & Type |
Details | |
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COMMAND MESSAGE |
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Message header |
m A |
(Subsequently returned to the Host unchanged). |
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Command code |
2 A |
Value QS. |
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Source zone PIN key |
16H or |
ZPK s encrypted under LMK pair 06-07. |
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Destination zone PIN key |
16H or |
ZPK d encrypted under LMK pair 06-07. |
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PIN verification key |
16 H |
PVK encrypted under LMK pair 14-15. |
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AB |
16 H |
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CD |
16 H |
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STAN |
6 N |
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CATID |
16 H |
Representing the 64 bit field. |
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AT |
12 H |
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Index flag |
1 A |
Value K. |
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Index pointer |
3 H |
Points at Diebold table. |
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Algorithm number |
2 H |
Diebold algorithm required. |
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PIN block |
16 H |
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PIN block format code |
2 N |
One of the valid format codes. |
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Account number |
12 N |
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Validation data |
20 H |
Note: This must be the full 20-hexadecimal character field, exactly as it is to be used. |
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Offset |
4 N |
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End message delimiter |
1 C |
Optional. Must be present if a message trailer is present. Value X’19. |
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Message trailer |
n A |
Optional. Maximum length 32 characters. |
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Field |
Length & Type |
Details | |
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RESPONSE MESSAGE |
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Message header |
n A |
Returned to the Host unchanged. |
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Response code |
2 A |
Value QT. |
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2 N |
00 : No errors 01 : PIN verification 10 : ZPKs parity error 11 : ZPKd or PVK parity error 12 : No keys loaded in user storage 13 : LMK error; report to supervisor 15 : Error in input data 20 : PIN block does not contain valid values 21 : Invalid user storage index 23 : Invalid PIN block format code 24 : PIN is fewer than 4 or more than 12 digits in length 90 : Communications link parity error 91 : Communications link LRC error 92 : Transparent async data length error |
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Auth Para |
16 H |
Auth Para encrypted under a variant of ZPK d (only if there is no error). |
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End message delimiter |
1 C |
Present only if present in the command message. Value X’19. |
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Message trailer |
n A |
Present only if present in the command message. Maximum length 32 characters. |
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