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- Стр. 191/436
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Many
great
minds
in
history
had
invented
cryptologic
solutions
to
the
challenge
of
data
protection
:
Julius
Caesar
devised
a
code
-
writing
scheme
called
the
Caesar
Box
;
Mary
,
Queen
of
Scots
created
a
transposition
cipher
and
sent
secret
communiqués
from
prison
;
and
the
brilliant
Arab
scientist
Abu
Yusuf
Ismail
al
-
Kindi
protected
his
secrets
with
an
ingeniously
conceived
polyalphabetic
substitution
cipher
.
Da
Vinci
,
however
,
eschewed
mathematics
and
cryptology
for
a
mechanical
solution
.
The
cryptex
.
A
portable
container
that
could
safeguard
letters
,
maps
,
diagrams
,
anything
at
all
.
Once
information
was
sealed
inside
the
cryptex
,
only
the
individual
with
the
proper
password
could
access
it
.
«
We
require
a
password
,
»
Sophie
said
,
pointing
out
the
lettered
dials
.
«
A
cryptex
works
much
like
a
bicycle
’
s
combination
lock
.
If
you
align
the
dials
in
the
proper
position
,
the
lock
slides
open
.
This
cryptex
has
five
lettered
dials
.
When
you
rotate
them
to
their
proper
sequence
,
the
tumblers
inside
align
,
and
the
entire
cylinder
slides
apart
.
»
«
And
inside
?
»
«
Once
the
cylinder
slides
apart
,
you
have
access
to
a
hollow
central
compartment
,
which
can
hold
a
scroll
of
paper
on
which
is
the
information
you
want
to
keep
private
.
»
Langdon
looked
incredulous
.
«
And
you
say
your
grandfather
built
these
for
you
when
you
were
younger
?
»
«
Some
smaller
ones
,
yes
.
A
couple
times
for
my
birthday
,
he
gave
me
a
cryptex
and
told
me
a
riddle
.
The
answer
to
the
riddle
was
the
password
to
the
cryptex
,
and
once
I
figured
it
out
,
I
could
open
it
up
and
find
my
birthday
card
.
»
«
A
lot
of
work
for
a
card
.
»
«
No
,
the
cards
always
contained
another
riddle
or
clue
.
My
grandfather
loved
creating
elaborate
treasure
hunts
around
our
house
,
a
string
of
clues
that
eventually
led
to
my
real
gift
.
Each
treasure
hunt
was
a
test
of
character
and
merit
,
to
ensure
I
earned
my
rewards
.
And
the
tests
were
never
simple
.
»
Langdon
eyed
the
device
again
,
still
looking
skeptical
.
«
But
why
not
just
pry
it
apart
?
Or
smash
it
?
The
metal
looks
delicate
,
and
marble
is
a
soft
rock
.
»
Sophie
smiled
.
«
Because
Da
Vinci
is
too
smart
for
that
.
He
designed
the
cryptex
so
that
if
you
try
to
force
it
open
in
any
way
,
the
information
self
-
destructs
.
Watch
.
»
Sophie
reached
into
the
box
and
carefully
lifted
out
the
cylinder
.
«
Any
information
to
be
inserted
is
first
written
on
a
papyrus
scroll
.
»
«
Not
vellum
?
»
Sophie
shook
her
head
.
«
Papyrus
.
I
know
sheep
’
s
vellum
was
more
durable
and
more
common
in
those
days
,
but
it
had
to
be
papyrus
.
The
thinner
the
better
.
»
