A
system
that
uses
some
____________________
human
characteristic
to
determine
the
identity
of
the
user
of
a
computer
system
.
Typical
characteristics
that
have
been
used
include
:
typing
characteristics
,
such
as
the
____________________
of
typing
or
the
number
of
____________________
made
;
the
image
of
a
____________________
;
fingerprints
;
hand
____________________
;
handwriting
characteristics
;
voice
____________________
;
DNA
patterns
;
and
eye
characteristics
;
voice
such
as
the
____________________
of
blood
vessels
in
the
retin
a
