<s>
A	O
self-shrinking	B-Algorithm
generator	I-Algorithm
is	O
a	O
pseudorandom	B-Algorithm
generator	I-Algorithm
that	O
is	O
based	O
on	O
the	O
shrinking	B-Algorithm
generator	I-Algorithm
concept	O
.	O
</s>
<s>
Variants	O
of	O
the	O
self-shrinking	B-Algorithm
generator	I-Algorithm
based	O
on	O
a	O
linear-feedback	B-Architecture
shift	I-Architecture
register	I-Architecture
(	O
LFSR	B-Architecture
)	O
are	O
studied	O
for	O
use	O
in	O
cryptography	O
.	O
</s>
<s>
In	O
difference	O
to	O
the	O
shrinking	B-Algorithm
generator	I-Algorithm
,	O
which	O
uses	O
a	O
second	O
feedback	O
shift	O
register	O
to	O
control	O
the	O
output	O
of	O
the	O
first	O
,	O
the	O
self-shrinking	B-Algorithm
generator	I-Algorithm
uses	O
alternating	O
output	O
bits	O
of	O
a	O
single	O
register	O
to	O
control	O
its	O
final	O
output	O
.	O
</s>
<s>
Clock	O
the	O
LFSR	B-Architecture
twice	O
to	O
obtain	O
a	O
pair	O
of	O
bits	O
as	O
LFSR	B-Architecture
output	O
.	O
</s>
<s>
Below	O
table	O
lists	O
,	O
for	O
each	O
iteration	O
of	O
the	O
LFSR	B-Architecture
,	O
its	O
intermediate	O
output	O
before	O
self-shrinking	O
,	O
as	O
well	O
as	O
the	O
final	O
generator	O
output	O
.	O
</s>
<s>
More	O
bits	O
are	O
created	O
by	O
continuing	O
to	O
clock	O
the	O
LFSR	B-Architecture
and	O
shrinking	O
its	O
output	O
as	O
described	O
above	O
.	O
</s>
<s>
In	O
their	O
paper	O
,	O
Meier	O
and	O
Steffelbach	O
prove	O
that	O
a	O
LFSR-based	O
self-shrinking	B-Algorithm
generator	I-Algorithm
with	O
a	O
connection	O
polynomial	O
of	O
length	O
L	O
results	O
in	O
an	O
output	O
sequence	O
period	O
of	O
at	O
least	O
2L/2	O
,	O
and	O
a	O
linear	O
complexity	O
of	O
at	O
least	O
2L/2	O
-1	O
.	O
</s>
<s>
Furthermore	O
,	O
they	O
show	O
that	O
any	O
self-shrinking	B-Algorithm
generator	I-Algorithm
can	O
be	O
represented	O
as	O
a	O
shrinking-generator	O
.	O
</s>
<s>
Any	O
shrinking	B-Algorithm
generator	I-Algorithm
can	O
be	O
implemented	O
as	O
a	O
self-shrinking	B-Algorithm
generator	I-Algorithm
,	O
although	O
the	O
resultant	O
generator	O
may	O
not	O
be	O
of	O
maximal	O
length	O
.	O
</s>
