Entering The Terminal Master Key - IBM 3274 51C Maintenance Information

I
6.4 Entering the Terminal Master Key
Perform this procedure only if you are authorized to enter
the Terminal Master Key. Contact the appropriate person
in your organization to obtain the Terminal Master Key,
Terminal Master Key Verification value (if available), and
the Control Unit 10 (CID).
1. If any terminals attached to the 3274 are in use,
notify all terminal operators that the 3274 operation
is going to be interrupted; then wait until all
operations are ended.
2. Use the 3178/3278/3279 attached to 3274 port AO to
perfoml this procedure. Locate the 3278/3279 att.ached
to 3274 port AO; make sure it has a keyboard and
IS
turned on.
3. An)(
~
397,)(
~
398, or)(
~
399 code
appearing in the Operator Information Area during
this procedure indicates an EncryptlDecrypt failure.
Refer to the 3274 Problem Determination Guide for
the recovery procedure.
4. Place the diskette drive operator knob in the open
position (as shown in the illustration) and remove
the diskette. Insert the Encrypt/Decrypt diskette
into the diskette enclosure and place the operator
knob in the closed position.
the open position
5. If the 3274 is turned on, press the IML pushbutton
on the 3274 control panel; if the 3274 is turned off,
press the
m
portion of the 3274 On/Off switch.
6. If the security key is not inserted into the 3274
security keylock (located in the customer access area,
below the Operator Panel), obtain the security key
from
tilt'
llppropriate person in your organization and
insert the key into the security keylock.
7. Make sure the security keylock is in the full clockwise
(horizontal) position; if it is not, turn the key clock-
wise to the horizontal position.
8. Go to the 3178/3278/3279 Display Station that is
attached to 3274 port
AO.
The top two rows of the
screen should contain the following information:
001
XXXXXXXXXXXX: ., .. X
9. Use the keyboard to enter the characters
1234567690ABCDEF into the character positions
occupied by the X's. If you miskey any characters,
use the cursor move keys
(~and~)
on the
right side of the keyboard to move the cursor to the
character position(s) to be corrected.
10. Press the ENTER key. The top two rows of the
display screen should change to:
EMKV
Note: If a 1 or a 2 appears at the top center of the
screen and EMKV does not appear, you entered the
1 through F characters incorrectly at Step 9. To
recover, enter the 1 through F characters correctly
and press the ENTER key again.
11. EMKV is a prompt message meaning "enter master
key value". Use the keyboard to enter (without
spaces) the 16 characters of the Terminal Master Key
into the positions occupied by the hyphens; the
valid characters that can be entered are the numbers
o
through 9 and the letters A through F. As each
character is entered, the corresponding hyphen will
be replaced by an asterisk (*). If you miskey a
character, press the RESET key and enter a1116
characters of the Terminal Master Key again.
12. Press the ENTER key. The top two rows of the
display screen should change to:
CIn
Note: If CID is not displayed and a Do Not hllfer
symbol ( )( ) is displayed ill the Operator Informa-
tion Area, you did not enter the correct Terminal
Master Key ill Step 11. The'meaning of the Operator
Information Area symbols is explained ill the 3278
Problem Determination Guide. To recover, press the
RESET key, enter the cOITect Terminal Master Key,
and press the ENTER key.
Chapter 6. 3274 Encrypt/Decrypt Feature 6-3