<s>
Bridgefy	B-Application
is	O
a	O
Mexican	O
software	O
company	O
with	O
offices	O
in	O
Mexico	O
and	O
California	O
,	O
the	O
United	O
States	O
,	O
dedicated	O
to	O
developing	O
mesh-networking	O
technology	O
for	O
mobile	O
apps	O
.	O
</s>
<s>
Bridgefy	B-Application
's	O
smartphone	B-Application
ad	I-Application
hoc	I-Application
network	I-Application
technology	O
,	O
apparently	O
using	O
Bluetooth	O
Mesh	O
,	O
is	O
licensed	O
to	O
other	O
apps	O
.	O
</s>
<s>
Aware	O
of	O
the	O
security	O
issues	O
of	O
not	O
using	O
cryptography	O
and	O
the	O
criticism	O
surrounding	O
it	O
,	O
Bridgefy	B-Application
announced	O
in	O
late	O
October	O
2020	O
that	O
they	O
adopted	O
the	O
Signal	B-Protocol
protocol	I-Protocol
,	O
in	O
both	O
their	O
app	O
and	O
SDK	O
,	O
to	O
keep	O
information	O
private	O
,	O
though	O
security	O
researchers	O
have	O
demonstrated	O
that	O
Bridgefy	B-Application
's	O
usage	O
of	O
the	O
Signal	B-Protocol
Protocol	I-Protocol
is	O
insecure	O
.	O
</s>
<s>
In	O
response	O
to	O
the	O
disclosures	O
,	O
developers	O
acknowledged	O
that	O
"	O
no	O
part	O
of	O
the	O
Bridgefy	B-Application
app	O
is	O
encrypted	O
now	O
"	O
and	O
gave	O
a	O
vague	O
promise	O
to	O
release	O
a	O
new	O
version	O
"	O
encrypted	O
with	O
top	O
security	O
protocols	O
"	O
.	O
</s>
<s>
Later	O
developers	O
said	O
they	O
plan	O
to	O
switch	O
to	O
Signal	B-Protocol
Protocol	I-Protocol
,	O
which	O
is	O
widely	O
recognized	O
by	O
cryptographers	O
and	O
used	O
by	O
Signal	B-Application
and	O
WhatsApp	B-Application
.	O
</s>
<s>
The	O
Signal	B-Protocol
Protocol	I-Protocol
was	O
integrated	O
into	O
the	O
Bridgefy	B-Application
app	O
and	O
SDK	O
by	O
late	O
October	O
2020	O
,	O
with	O
the	O
developers	O
claiming	O
to	O
have	O
included	O
improvements	O
such	O
as	O
the	O
impossibility	O
of	O
a	O
third	O
person	O
impersonating	O
any	O
other	O
user	O
,	O
man-in-the-middle	O
attacks	O
done	O
by	O
modifying	O
stored	O
keys	O
,	O
and	O
historical	O
proximity	O
tracking	O
;	O
among	O
others	O
.	O
</s>
<s>
However	O
,	O
in	O
2022	O
,	O
the	O
same	O
security	O
researchers	O
,	O
now	O
including	O
Kenny	O
Paterson	O
,	O
published	O
a	O
paper	O
describing	O
how	O
Bridgefy	B-Application
's	O
usage	O
of	O
the	O
Signal	B-Protocol
Protocol	I-Protocol
is	O
incorrect	O
,	O
failing	O
to	O
remedy	O
the	O
previously	O
discovered	O
issues	O
.	O
</s>
<s>
The	O
researchers	O
disclosed	O
the	O
vulnerabilities	O
to	O
the	O
developers	O
of	O
Bridgefy	B-Application
in	O
August	O
2021	O
,	O
but	O
,	O
according	O
to	O
the	O
researchers	O
,	O
the	O
developers	O
have	O
yet	O
to	O
resolve	O
the	O
issues	O
as	O
of	O
June	O
2022	O
.	O
</s>
