Defeating authentication follows the method–opportunity–motive paradigm described in Chapter 1. Discuss how these three factors apply to an attack on authentication

What will be an ideal response?

Method:
There
are
many
potential
methods
to
defeating
authentication:
password
guessing,
brute-­?force
attacks,
biometric
forgery,
identity
theft,
guessing
answers
to
password
reset
questions,
etc.
Opportunity:
Opportunity
changes
depending
on
a
variety
of
factors,
such
as
how
accessible
the
system
is,
how
it
behaves
when
a
user
fails
to
authenticate
a
number
of
times,
what
types
of
passwords
it
allows,
and
how
the
system
resets
lost
passwords.
Motive:
This
is
typically
something
of
value
the
attacker
might
gain
from
defeating
the
authentication.
Without
a
motive,
an
attacker
would
have
no
reason
to
execute
the
attack
and
certainly
not
to
pour
expensive
resources
into
it.