<s>
The	O
SYSV	B-Algorithm
checksum	I-Algorithm
algorithm	O
was	O
a	O
commonly	O
used	O
,	O
legacy	O
checksum	B-Algorithm
algorithm	O
.	O
</s>
<s>
It	O
has	O
been	O
implemented	O
in	O
UNIX	B-Operating_System
System	I-Operating_System
V	I-Operating_System
and	O
is	O
also	O
available	O
through	O
the	O
sum	O
command	O
line	O
utility	O
.	O
</s>
<s>
This	O
algorithm	O
is	O
useless	O
on	O
a	O
security	O
perspective	O
,	O
and	O
is	O
weaker	O
than	O
the	O
CRC-32	O
cksum	B-Device
for	O
error	O
detection	O
.	O
</s>
<s>
moving	O
text	O
from	O
one	O
place	O
to	O
another	O
place	O
)	O
does	O
not	O
change	O
the	O
checksum	B-Algorithm
.	O
</s>
<s>
increasing	O
one	O
byte	O
and	O
decreasing	O
another	O
byte	O
by	O
the	O
same	O
amount	O
does	O
not	O
change	O
the	O
checksum	B-Algorithm
.	O
</s>
<s>
adding	O
or	O
removing	O
zero	O
bytes	O
does	O
not	O
change	O
the	O
checksum	B-Algorithm
.	O
</s>
