NCR 5945, Руководство пользователя, Страница: 51 / 92

Chapter 5: NCR 5945 Diagnostics Specification 5-15
Key Check Value
Used to verify that the correct keys are injected into the appropriate
index. The key check value is defined as the first six characters of the
encrypted result obtained by encrypting known data (all zeros) with
the designated key.
Menu Option Description
DIAGNOSTICS
Key Check Value
Pressing Enter will select the
displayed menu option.
Note: Press Yes or No to move
forward or backward through the
menu options.
Selecting this option, the user is prompted for
index. Valid indices are 0-9 for
Master/Session and 0-3 for DUKPT.
Note:
The displayed result does not
reveal any information about the key
that has been injected but allows the
user enough information to verify with
a high degree of probability that the
correct key has been injected.
Note:
The NCR 5945 stores all master
keys as double length keys
Key Check Value
Master 1st Part
Displays the key check value for the first
part of double length master key.
Key Check Value
Master 2nd Part
Displays key check value for the second
part of double length master key.
Key Check Value
Master Double
Displays the key check value for the
entire double length master key.
Key Check Value
Session
Displays the key check value for the
session key of a Master/Session key pair.