<s>
In	O
cryptography	O
,	O
the	O
Pointcheval	B-Algorithm
–	I-Algorithm
Stern	I-Algorithm
signature	I-Algorithm
algorithm	I-Algorithm
is	O
a	O
digital	O
signature	O
scheme	O
based	O
on	O
the	O
closely	O
related	O
ElGamal	B-Algorithm
signature	I-Algorithm
scheme	I-Algorithm
.	O
</s>
