<s>
Geometric	B-Algorithm
cryptography	I-Algorithm
is	O
an	O
area	O
of	O
cryptology	O
where	O
messages	O
and	O
ciphertexts	O
are	O
represented	O
by	O
geometric	O
quantities	O
such	O
as	O
angles	O
or	O
intervals	O
and	O
where	O
computations	O
are	O
performed	O
by	O
ruler	O
and	O
compass	O
constructions	O
.	O
</s>
<s>
The	O
difficulty	O
or	O
impossibility	O
of	O
solving	O
certain	O
geometric	O
problems	O
like	O
trisection	O
of	O
an	O
angle	O
using	O
ruler	O
and	O
compass	O
only	O
is	O
the	O
basis	O
for	O
the	O
various	O
protocols	O
in	O
geometric	B-Algorithm
cryptography	I-Algorithm
.	O
</s>
<s>
Geometric	B-Algorithm
cryptography	I-Algorithm
may	O
have	O
applications	O
in	O
the	O
future	O
once	O
current	O
mainstream	O
encryption	O
methods	O
are	O
made	O
obsolete	O
by	O
quantum	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
The	O
protocol	O
is	O
also	O
zero-knowledge	B-Protocol
.	O
</s>
