<s>
Peerio	B-Application
was	O
a	O
cross-platform	B-Operating_System
end-to-end	O
encrypted	O
application	O
that	O
provided	O
secure	O
messaging	O
,	O
file	O
sharing	O
,	O
and	O
cloud	O
file	O
storage	O
.	O
</s>
<s>
Peerio	B-Application
was	O
available	O
as	O
an	O
application	O
for	O
iOS	B-Application
,	O
Android	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Application
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
Peerio	B-Application
(	O
Legacy	O
)	O
was	O
originally	O
released	O
on	O
14	O
January	O
2015	O
,	O
and	O
was	O
replaced	O
by	O
Peerio	B-Application
2	O
on	O
15	O
June	O
2017	O
.	O
</s>
<s>
Messages	O
and	O
user	O
files	O
stored	O
on	O
the	O
Peerio	B-Application
cloud	O
were	O
protected	O
by	O
end-to-end	O
encryption	O
,	O
meaning	O
the	O
data	O
was	O
encrypted	O
in	O
a	O
way	O
that	O
could	O
not	O
be	O
read	O
by	O
third	O
parties	O
,	O
such	O
as	O
Peerio	B-Application
itself	O
or	O
its	O
service	O
providers	O
.	O
</s>
<s>
Security	O
was	O
provided	O
by	O
a	O
single	O
permanent	O
key-password	O
,	O
which	O
in	O
Peerio	B-Application
was	O
called	O
an	O
"	O
Account	O
Key	O
"	O
.	O
</s>
<s>
The	O
company	O
,	O
Peerio	B-Application
Technologies	O
Inc.	O
,	O
was	O
founded	O
in	O
2014	O
by	O
Vincent	O
Drouin	O
.	O
</s>
<s>
The	O
intent	O
behind	O
Peerio	B-Application
was	O
to	O
provide	O
a	O
security	O
program	O
that	O
is	O
easier	O
to	O
use	O
than	O
the	O
PGP	B-Application
standard	O
.	O
</s>
<s>
Peerio	B-Application
was	O
acquired	O
by	O
WorkJam	O
,	O
a	O
digital	O
workplace	O
solutions	O
provide	O
,	O
on	O
January	O
13	O
,	O
2019	O
.	O
</s>
<s>
Peerio	B-Application
allowed	O
users	O
to	O
share	O
encrypted	O
messages	O
and	O
files	O
in	O
direct	O
messages	O
or	O
groups	O
that	O
Peerio	B-Application
called	O
"	O
rooms	O
"	O
.	O
</s>
<s>
Peerio	B-Application
"	O
rooms	O
"	O
were	O
offered	O
as	O
a	O
team-oriented	O
group	O
chat	O
,	O
allowing	O
administrative	O
functionality	O
to	O
add	O
and	O
remove	O
other	O
users	O
from	O
the	O
group	O
chat	O
.	O
</s>
<s>
Peerio	B-Application
allowed	O
users	O
to	O
store	O
encrypted	O
files	O
online	O
,	O
offering	O
limited	O
cloud	O
storage	O
for	O
free	O
with	O
optional	O
paid	O
upgrades	O
.	O
</s>
<s>
Peerio	B-Application
messages	O
and	O
files	O
persist	B-Application
between	O
logins	O
and	O
hardware	O
,	O
differing	O
from	O
ephemeral	B-Application
encrypted	O
messaging	O
apps	O
which	O
do	O
not	O
retain	O
message	O
or	O
file	O
history	O
between	O
logins	O
or	O
different	O
devices	O
.	O
</s>
<s>
Peerio	B-Application
supported	O
application	O
based	O
multi-factor	O
authentication	O
.	O
</s>
<s>
Peerio	B-Application
allowed	O
users	O
to	O
share	O
animated	O
GIFs	O
.	O
</s>
<s>
Peerio	B-Application
utilized	O
end-to-end	O
encryption	O
and	O
it	O
was	O
applied	O
by	O
default	O
to	O
all	O
message	O
and	O
file	O
data	O
.	O
</s>
<s>
Taken	O
from	O
Peerio	B-Application
's	O
privacy	O
policy	O
:	O
</s>
<s>
"	O
Peerio	B-Application
utilizes	O
the	O
NaCl	B-Application
(	O
pronounced	O
"	O
salt	O
"	O
)	O
cryptographic	O
framework	O
,	O
which	O
itself	O
uses	O
the	O
following	O
cryptographic	O
primitives	O
:	O
</s>
<s>
X25519	B-Application
for	O
public	O
key	O
agreement	O
over	O
elliptic	O
curves	O
.	O
</s>
<s>
Poly1305	B-Algorithm
for	O
ensuring	O
the	O
integrity	O
of	O
encrypted	O
data	O
.	O
</s>
<s>
Additionally	O
,	O
Peerio	B-Application
uses	O
scrypt	B-Algorithm
for	O
memory-hard	O
key	O
derivation	O
and	O
BLAKE2s	B-Algorithm
is	O
used	O
for	O
various	O
hashing	O
operations	O
.	O
</s>
<s>
For	O
in-transit	O
encryption	O
,	O
Peerio	B-Application
Services	O
used	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
(	O
TLS	O
)	O
with	O
best-practice	O
cipher	O
suite	O
configuration	O
,	O
including	O
support	O
for	O
perfect	O
forward	O
secrecy	O
(	O
PFS	O
)	O
.	O
</s>
<s>
You	O
can	O
view	O
a	O
detailed	O
and	O
up-to-date	O
independent	O
review	O
of	O
Peerio	B-Application
's	O
TLS	O
configuration	O
on	O
SSL	O
Labs.	O
"	O
</s>
<s>
Prior	O
to	O
Peerio	B-Application
's	O
initial	O
release	O
,	O
the	O
software	O
was	O
audited	O
by	O
the	O
German	O
security	O
firm	O
Cure53	O
,	O
which	O
found	O
only	O
non-security	O
related	O
bugs	O
,	O
all	O
of	O
which	O
were	O
fixed	O
prior	O
to	O
the	O
applications	O
release	O
.	O
</s>
<s>
According	O
to	O
Peerio	B-Application
's	O
website	O
,	O
the	O
application	O
was	O
also	O
audited	O
in	O
March	O
2017	O
by	O
Cure53	O
.	O
</s>
<s>
Peerio	B-Application
offered	O
a	O
bug	O
bounty	O
,	O
offering	O
cash	O
rewards	O
for	O
anyone	O
who	O
reports	O
security	O
vulnerabilities	O
.	O
</s>
<s>
The	O
first	O
iteration	O
of	O
Peerio	B-Application
,	O
Peerio	B-Application
(	O
Legacy	O
)	O
,	O
was	O
developed	O
by	O
Nadim	O
Kobeissi	O
and	O
Florencia	O
Herra-Vega	O
and	O
was	O
released	O
on	O
14	O
January	O
2015	O
and	O
was	O
closed	O
on	O
8	O
January	O
2018	O
.	O
</s>
<s>
Peerio	B-Application
(	O
Legacy	O
)	O
was	O
a	O
free	O
application	O
,	O
available	O
for	O
Android	B-Application
,	O
iOS	B-Application
,	O
Windows	B-Application
,	O
macOS	B-Application
,	O
Linux	B-Application
,	O
and	O
as	O
a	O
Google	O
Chrome	O
extension	O
.	O
</s>
<s>
The	O
encryption	O
used	O
the	O
miniLock	O
open-source	B-Application
security	O
standard	O
,	O
which	O
was	O
also	O
developed	O
by	O
Kobeissi	O
.	O
</s>
<s>
On	O
15	O
June	O
2017	O
,	O
Peerio	B-Application
2	O
was	O
launched	O
as	O
the	O
successor	O
to	O
Peerio	B-Application
(	O
Legacy	O
)	O
.	O
</s>
<s>
According	O
to	O
the	O
company	O
's	O
blog	O
,	O
Peerio	B-Application
2	O
is	O
purported	O
to	O
be	O
a	O
"	O
radical	O
overhaul	O
"	O
of	O
the	O
original	O
application	O
's	O
core	O
technology	O
.	O
</s>
<s>
Claimed	O
benefits	O
in	O
comparison	O
to	O
Peerio	B-Application
(	O
Legacy	O
)	O
include	O
increased	O
speed	O
,	O
support	O
for	O
larger	O
file	O
transfers	O
(	O
up	O
to	O
7000GB	O
)	O
,	O
and	O
a	O
re-designed	O
user	O
interface	O
.	O
</s>
<s>
Peerio	B-Application
also	O
stated	O
an	O
added	O
focus	O
towards	O
businesses	O
looking	O
for	O
encrypted	O
team	O
collaboration	O
software	O
.	O
</s>
