<s>
In	O
the	O
field	O
of	O
security	O
engineering	O
,	O
a	O
pre-play	B-General_Concept
attack	I-General_Concept
is	O
a	O
cryptographic	O
attack	O
in	O
which	O
an	O
attacker	O
prepares	O
for	O
the	O
attack	O
in	O
advance	O
by	O
carrying	O
out	O
a	O
simulated	O
transaction	O
while	O
pretending	O
to	O
be	O
the	O
device	O
to	O
be	O
attacked	O
,	O
and	O
then	O
repeats	O
the	O
attack	O
a	O
second	O
time	O
with	O
the	O
real	O
device	O
at	O
a	O
time	O
when	O
it	O
is	O
likely	O
to	O
carry	O
out	O
the	O
same	O
series	O
of	O
operations	O
as	O
in	O
the	O
simulation	O
.	O
</s>
<s>
Pre-play	B-General_Concept
attacks	I-General_Concept
are	O
not	O
very	O
effective	O
and	O
chances	O
of	O
success	O
are	O
slim	O
.	O
</s>
