<s>
Echo	B-Protocol
(	O
one-to-all	O
,	O
one-to-one	O
,	O
or	O
one-to-some	O
distribution	O
)	O
is	O
a	O
group	O
communications	O
protocol	O
where	O
authenticated	O
and	O
encrypted	O
information	O
is	O
addressed	O
to	O
members	O
connected	O
to	O
a	O
node	B-Protocol
.	O
</s>
<s>
Adaptive	O
Echo	B-Protocol
,	O
Full	O
Echo	B-Protocol
,	O
and	O
Half	O
Echo	B-Protocol
can	O
be	O
chosen	O
as	O
several	O
modes	O
of	O
the	O
encrypted	O
Echo	B-Protocol
protocol	O
.	O
</s>
<s>
The	O
Echo	B-Protocol
protocol	O
offers	O
three	O
modes	O
of	O
operation	O
:	O
Adaptive	O
Echo	B-Protocol
,	O
Full	O
Echo	B-Protocol
,	O
and	O
Half	O
Echo	B-Protocol
.	O
</s>
<s>
The	O
Adaptive	O
Echo	B-Protocol
distributes	O
messages	O
to	O
parties	O
that	O
have	O
shown	O
awareness	O
of	O
a	O
secret	O
token	O
.	O
</s>
<s>
Full	O
Echo	B-Protocol
or	O
simply	O
Echo	B-Protocol
sends	O
each	O
message	O
to	O
every	O
neighbor	O
.	O
</s>
<s>
Every	O
neighbor	O
does	O
the	O
same	O
,	O
unless	O
it	O
's	O
the	O
target	O
node	B-Protocol
of	O
a	O
specific	O
message	O
.	O
</s>
<s>
Nodes	O
can	O
be	O
client	B-Protocol
,	O
server	B-Application
,	O
or	O
both	O
.	O
</s>
<s>
The	O
Half	O
Echo	B-Protocol
sends	O
the	O
message	O
only	O
to	O
a	O
direct	O
neighbor	O
.	O
</s>
<s>
If	O
configured	O
correctly	O
,	O
the	O
target	O
node	B-Protocol
will	O
not	O
disperse	O
the	O
received	O
message	O
to	O
other	O
nearby	O
nodes	O
.	O
</s>
<s>
A	O
server	B-Application
node	B-Protocol
may	O
establish	O
accounts	O
and	O
then	O
distribute	O
the	O
credentials	O
 '	O
information	O
.	O
</s>
