Data Security - IBM 5110 User Manual

DATA SECURITY
You are primarily responsible for the security of any sensitive data.
After you are through using the 5110, you can remove the data in the
active workspace by one of the following:
• Using the )CLEAR command to clear the active workspace
• Pressing the RESTART switch
• Turning the POWER ON/OFF switch to off
There are several methods available for protecting or removing
sensitive data on a tape or diskette. These methods are:
• Assigning a password to the workspace when the system is writing
the active workspace on the media.
• Rewriting a file, which makes the old data inaccessible.
• Filling a data file with meaningless data. For example, the following
user-defined function fills file 4, a data file named OAT A on tape 1,
with zeros:
VSECU
I:~
I
TY ;
f.);
B
1:::1.] :I. []BVO • A
I
[2]
A~'OUT
1004 ID=(DATA)'
[:
:.~
] B
~
..
:1.
0
:1.
0·0 0
(.>
[I
I::
'4·
:I l.J
I~ : f.l ~ .. B
[~.:j]
..
~
(PI[
1.
]::::0)
/~JR'\I
• Setting the tape cartridge SAFE switch in the SAFE position to
prevent someone from accidently writing on the tape.
• Using the )PROTECT command to prevent someone from accidently
writing on a diskette file.
• Using the )VOLIO command to prevent unauthorized access to the
diskette files.
• Storing the tape or diskette in a secure place.
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