Discussion:
Dan Brown's "Digital Fortress"
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m***@gmail.com
2007-03-26 14:14:44 UTC
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So I've just started reading Dan Brown's "Digital Fortress." It's been
about ten years since it's been published. But there were a couple
things that I noticed and wanted to mention. The sentence "No more
secrets." in chapter 3 or 4 is a big tip of the hat to the movie
"Sneakers." Very cool.

The other thing I wanted to have a crack at was the ciphertext in
Chapter 3:
JHdja3jKHDhmado/ertwtjlw+jgj328
5jhalsfnHKhhhfafOhhdfgaf/fj37we
ohi93450s9djfd2h/HHrtyFHLf89303
95jspjf2j0890Ihj98yhfi080ewrt03
jojr845h0roq+jt0eu4tqefqe//oujw
08UY0IH0934jtpwfiajer09qu4jr9gu
ivjP$duw4h95pe8rtugvjw3p4e/ikkc
mffuerhfgv0q394ikjrmg+unhvs9oer
irk/0956y7u0poikIOjp9f8760qwerqi

At first glance I noticed that it uses upper and lower case letters as
well as the 10 digits and the characters + and /. The 64 characters
are convenient for encoding data into text (Does uuencoding do
this?).

Any way, the other thing I noticed was the text above was probably
typed in by some one sitting at a keyboard typing in letters randomly.
There are a lot of runs of 3 or more letters that are consecutive on a
QWERTY keyboard. For example, look for "qwer", "ert", "rty", "56y7",
"890" etc...

It would have been cool if this were a real code to crack. I know that
Dan Brown wrote hidden puzzles into the Da Vinci Code.

The last thing I noticed is that he wrote:
"The number of different possibilities was in the neighborhood of
10 [to the power of] 120-ten with 120 zeros after it. Correctly
guessing
a pass-key was as mathematically unlikely as choosing the correct
grain
of sand from a three-mile beach."
Am I missing something? It's actually much *much* harder to guess than
that isn't it? There aren't 10^120 atoms in the entire universe!

So far a cool book though! Can't wait to keep reading. What did you
think of it?

mjswart, Waterloo
b***@myrealbox.com
2007-03-27 01:37:12 UTC
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Post by m***@gmail.com
So I've just started reading Dan Brown's "Digital Fortress." It's been
about ten years since it's been published.
Yes, and several years since I read it, and I'm not a big fan of Dan
Brown's books in general, so take my comments with a grain of salt ....
Post by m***@gmail.com
But there were a couple
things that I noticed and wanted to mention. The sentence "No more
secrets." in chapter 3 or 4 is a big tip of the hat to the movie
"Sneakers." Very cool.
Yeah. (Was that a good movie? I've heard of it but not seen it.)
Post by m***@gmail.com
The other thing I wanted to have a crack at was the ciphertext in
JHdja3jKHDhmado/ertwtjlw+jgj328
5jhalsfnHKhhhfafOhhdfgaf/fj37we
ohi93450s9djfd2h/HHrtyFHLf89303
95jspjf2j0890Ihj98yhfi080ewrt03
jojr845h0roq+jt0eu4tqefqe//oujw
08UY0IH0934jtpwfiajer09qu4jr9gu
ivjP$duw4h95pe8rtugvjw3p4e/ikkc
mffuerhfgv0q394ikjrmg+unhvs9oer
irk/0956y7u0poikIOjp9f8760qwerqi
At first glance I noticed that it uses upper and lower case letters as
well as the 10 digits and the characters + and /. The 64 characters
are convenient for encoding data into text (Does uuencoding do
this?).
Any way, the other thing I noticed was the text above was probably
typed in by some one sitting at a keyboard typing in letters randomly.
There are a lot of runs of 3 or more letters that are consecutive on a
QWERTY keyboard. For example, look for "qwer", "ert", "rty", "56y7",
"890" etc...
It would have been cool if this were a real code to crack. I know that
Dan Brown wrote hidden puzzles into the Da Vinci Code.
"The number of different possibilities was in the neighborhood of
10 [to the power of] 120-ten with 120 zeros after it.
It's probably nitpicky and snide of me to mention this, but isn't
10 followed by 120 zeros 10 to the 121 rather than 10 to the 120?
(I'm not really surprised. I found a lot to nitpick about in the
(pseudo?)mathematical bits of _The Da Vinci Code_ too.)

I wonder also where he gets the number. If this is meant to be a
simple substitution cipher, it seems to me that there would be 64!
(64 factorial, 64 * 63 * .... * 1) possibilities, which a few
minutes' work with my calculator program says is closer to 10**90
(10 to the 90th power).

If it's not a simple substitution cipher, then I'm not sure how
to calculate the number of possibilities. Maybe someone else can
help here.
Post by m***@gmail.com
Correctly
guessing
a pass-key was as mathematically unlikely as choosing the correct
grain
of sand from a three-mile beach."
Am I missing something? It's actually much *much* harder to guess than
that isn't it? There aren't 10^120 atoms in the entire universe!
My guess is that Mr. Brown doesn't let details like that get in the
way of telling what he thinks is a good story.
Post by m***@gmail.com
So far a cool book though! Can't wait to keep reading. What did you
think of it?
Not to rain on your parade, and you may like it, but -- I found the
technological details preposterous (I'm an academic computer science
type), and that got in the way of my really enjoying the book, though
it was enough of a page-turner that I did finish it.

Maybe I should just close with "don't get me started on computers in
mass-market fiction" -- most of it seems to me to be at least a little
preposterous, and as if the author just made stuff up to make a good
story rather than attempting to do some research into what's plausible.
This irritates me, but I suppose it's the author's prerogative, and
a person probably can't research *everything*. It just makes me a
little cautious about believing what I read in popular fiction about
things I *don't* know much about!
--
B. L. Massingill
ObDisclaimer: I don't speak for my employers; they return the favor.
william
2007-03-27 03:11:48 UTC
Permalink
Post by b***@myrealbox.com
Not to rain on your parade, and you may like it, but -- I found the
technological details preposterous (I'm an academic computer science
type), and that got in the way of my really enjoying the book, though
it was enough of a page-turner that I did finish it.
That's the least of it. I loved how nobody at the NSA worked weekends.
It is a page turner and I turned every page wondering why I was
turning every page but I did in fact turn every page. As for Sneakers,
it's a fun geek flick. If you're interested in computers and film you
might want to check out "A Beast in a Box: A short history of
computers in film" on my website. How often do you get Spencer Tracy,
Katerine Hepburn and Grace Hopper in the same review?

william
www.williamahearn.com

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