<s>
In	O
cryptography	O
,	O
GMR	B-Algorithm
is	O
a	O
digital	O
signature	O
algorithm	O
named	O
after	O
its	O
inventors	O
Shafi	O
Goldwasser	O
,	O
Silvio	O
Micali	O
and	O
Ron	O
Rivest	O
.	O
</s>
<s>
As	O
with	O
RSA	B-Architecture
the	O
security	O
of	O
the	O
system	O
is	O
related	O
to	O
the	O
difficulty	O
of	O
factoring	O
very	O
large	O
numbers	O
.	O
</s>
<s>
But	O
,	O
in	O
contrast	O
to	O
RSA	B-Architecture
,	O
GMR	B-Algorithm
is	O
secure	O
against	O
adaptive	O
chosen-message	O
attacks	O
,	O
which	O
is	O
the	O
currently	O
accepted	O
security	O
definition	O
for	O
signature	O
schemes	O
even	O
when	O
an	O
attacker	O
receives	O
signatures	O
for	O
messages	O
of	O
his	O
choice	O
,	O
this	O
does	O
not	O
allow	O
them	O
to	O
forge	O
a	O
signature	O
for	O
a	O
single	O
additional	O
message	O
.	O
</s>
