<s>
A	O
designated	B-Algorithm
verifier	I-Algorithm
signature	I-Algorithm
is	O
a	O
signature	O
scheme	O
in	O
which	O
signatures	O
can	O
only	O
be	O
verified	O
by	O
a	O
single	O
,	O
designated	O
verifier	O
,	O
designated	O
as	O
part	O
of	O
the	O
signature	O
creation	O
.	O
</s>
<s>
Designated	B-Algorithm
verifier	I-Algorithm
signatures	I-Algorithm
were	O
first	O
proposed	O
in	O
1996	O
by	O
Jakobsson	O
Markus	O
,	O
Kazue	O
Sako	O
,	O
and	O
Russell	O
Impagliazzo	O
.	O
</s>
<s>
Proposed	O
as	O
a	O
way	O
to	O
combine	O
authentication	O
and	O
off-the-record	O
messages	O
,	O
designated	B-Algorithm
verifier	I-Algorithm
signatures	I-Algorithm
allow	O
authenticated	O
,	O
private	O
conversations	O
to	O
take	O
place	O
.	O
</s>
<s>
Unlike	O
in	O
undeniable	B-Algorithm
signature	I-Algorithm
scheme	O
the	O
protocol	O
of	O
verifying	O
is	O
non-interactive	O
;	O
i.e.	O
,	O
the	O
signer	O
chooses	O
the	O
designated	O
verifier	O
(	O
or	O
the	O
set	O
of	O
designated	O
verifiers	O
)	O
in	O
advance	O
and	O
does	O
not	O
take	O
part	O
in	O
the	O
verification	O
process	O
.	O
</s>
