DUKPT KSN
5_2_1 Validating Special Keys
To validate the Key Check Value (KTK), select the [KEY CHECK VALUE] option from the Telium System Application menu and
follow the subsequent selections as illustrated in the below figure. Only the KTK value needs to be checked to ensure KTK
encryption. If a generic default value of “KTK KCV (7AE462)” is displayed then this indicates that no keys are present.
5_2_2 Master Session
Using the Key Check Value menu, verify that keys are injected. Refer to the below figure for this process.
5_2_3 DUKPT KSN
The DUKPT KSN consists of 3 different values. The first 10 digits represent the KSI value assigned to a customer or region. The KSI
is used to verify the key information. The next 5 digits are the device ID, and the last 5 digits are the encryption counter. The counter
increases for each encryption. To validate that the DUKPT encryption key has been injected and is correct, select the [DUKPT KSN]
option from the TSA menu. Refer to the below figure.
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