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Command: |
Generate Auth Para at the Card Issuer. |
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Note: |
The command enables the Card Issuer to generate Auth Para when no PIN is to be verified, but the CD fields are not known at the Acquirer. Auth Para is returned encrypted under a variant of a Zone PIN key (ZPK). |
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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 RU. |
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Source zone PIN key |
16H or |
ZPK encrypted under LMK pair 06-07. |
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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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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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RESPONSE MESSAGE |
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Message header |
n A |
Returned to the Host unchanged. |
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Response code |
2 A |
Value RV. |
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Error code |
2 N |
00 : No errors 10 : ZPK parity error 12 : No keys loaded in user storage 13 : LMK error; report to supervisor 15 : Error in input data 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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