Who knows encryptions?

> 10 years ago
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GreenPat
GreenPat
QLD
4105 posts
QLD, 4105 posts
24 Mar 2008 7:31pm
Is this one meant to be hard or easy?

a=l
b=v
c=x
d=s
e=w
f=d
g=f
h=g
i=u
j=h
k=j
l=k
m=n
n=b
o=i
p=o
q=p
r=e
s=a
t=r
u=y
v=c
w=q
x=z
y=t
z=m
nebbian
nebbian
WA
6277 posts
WA, 6277 posts
24 Mar 2008 6:58pm
Easy... all simple ciphers like this one fall quickly once you try some frequency analysis on them.

Cryptography is a huge field, involves heaps of maths, and is normally best left to the experts
GreenPat
GreenPat
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24 Mar 2008 8:08pm
nebbian said...

, and is normally best left to the experts


I'll take your word for it. I don't think engineering statistics even comes close, in retrospect.
decrepit
decrepit
WA
12885 posts
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24 Mar 2008 10:43pm
Think what Nebs means by frequency analysis is how many times a symbol appears in any text. Sort of a statistical analysis, there's a known frequency of use for all the letters of the alphabet, so it's very easy to sort out what symbol is what letter.
Of course the larger the text the more accurate it is, and the statistics probably vary with whatever language it's in.
GreenPat
GreenPat
QLD
4105 posts
QLD, 4105 posts
25 Mar 2008 1:31am
Yeah I got it. Still be curious as to what the exact cipher for this is, without any text to go with it.
evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
25 Mar 2008 3:38pm
Yes, that is as easy as they get.
GreenPat
GreenPat
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25 Mar 2008 10:08pm
Tell me the answer then...
poor relative
poor relative
WA
9106 posts
WA, 9106 posts
25 Mar 2008 9:09pm
i have a double jointed thumb and can make a fart noise from my armpit
NotWal
NotWal
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25 Mar 2008 10:16pm
GreenPat said...

Tell me the answer then...


The answer to what?
poor relative
poor relative
WA
9106 posts
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25 Mar 2008 9:34pm
GreenPat
GreenPat
QLD
4105 posts
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25 Mar 2008 10:47pm
NotWal said...

GreenPat said...

Tell me the answer then...


The answer to what?


What's the cipher to the above encryption, before I have to go and look in the back of the textbook? No there isn't any text to go with it for a statistical analysis, it's meant to be easy enough without it.
decrepit
decrepit
WA
12885 posts
WA, 12885 posts
25 Mar 2008 10:39pm
Surely the answer is in the first post, that's the substitution table, nothing else is needed.
nebbian
nebbian
WA
6277 posts
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25 Mar 2008 10:43pm
The cipher is a normal qwerty keyboard.

To get each letter, find it on the keyboard, then go one key to the left, wrapping around if it's the leftmost letter.

Eg find w, the letter to the left is q so w=q. I said it would be easy, but I didn't realise what you were on about at first.

Do I win a prize?
elizabethb
elizabethb
QLD
2081 posts
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25 Mar 2008 11:59pm
nebbian said...

The cipher is a normal qwerty keyboard.

To get each letter, find it on the keyboard, then go one key to the left, wrapping around if it's the leftmost letter.

Eg find w, the letter to the left is q so w=q. I said it would be easy, but I didn't realise what you were on about at first.

Do I win a prize?


You are a smart little cookie aren't you Nebs

GreenPat
GreenPat
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4105 posts
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26 Mar 2008 12:37am
nebbian said...

Do I win a prize?


How about a date with Poor Relative? Or a smelly old sock, take your pick.
greenleader
greenleader
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26 Mar 2008 1:02am
GreenPat
GreenPat
QLD
4105 posts
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26 Mar 2008 1:10am
Speaking of nerds, perhaps evlPanda should win a prize for being the only one on this thread so far with less than a thousand posts.
nebbian
nebbian
WA
6277 posts
WA, 6277 posts
26 Mar 2008 12:37am
If you're really interested in this stuff, read "Cryptonomicon" by Neal Stephenson.

And rejoice in your geekery for it is written in the bible:

The Geek shall inherit the earth
easty
easty
TAS
2213 posts
TAS, 2213 posts
26 Mar 2008 9:58am
GreenPat said...

Speaking of nerds, perhaps evlPanda should win a prize for being the only one on this thread so far with less than a thousand posts.


Cool, does that mean I get a prize too?

evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
26 Mar 2008 11:16am
GreenPat said...

Speaking of nerds, perhaps evlPanda should win a prize for being the only one on this thread so far with less than a thousand posts.


I'm trying...
evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
26 Mar 2008 11:17am
GreenPat said...

Speaking of nerds, perhaps evlPanda should win a prize for being the only one on this thread so far with less than a thousand posts.


I'm trying...

(sheesh, gotta wait 30 seconds between posts, else is spam)
evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
26 Mar 2008 11:17am
GreenPat said...

Speaking of nerds, perhaps evlPanda should win a prize for being the only one on this thread so far with less than a thousand posts.


Nearly there.
evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
26 Mar 2008 11:24am
decrepit said...

Surely the answer is in the first post, that's the substitution table, nothing else is needed.


Agreed. The first post is the cipher.

en.wikipedia.org/wiki/Cipher

... although you could definately argue that the cipher is what nebbian described, the pattern actually used.

I think you've been given a poorly worded question. I would have expected it to say something like:

What is the cipher for the following catchphrase: "qubsayedubf ua lssuxruce"

Off-topic a little, the patterns reminded me and I'm a programmer, there's a really interesting book by Wolfram called "A New Kind of Science". I'll rip the library journal description here:

"Galileo proclaimed that nature is written in the language of mathematics, but Wolfram would argue that it is written in the language of programs and, remarkably, simple ones at that. ... Wolfram went on to discover that the same vastly complex images could be produced by even very simple sets of rules and argues here that dynamic and complex systems throughout nature are triggered by simple programs. Mathematical science can describe and in some cases predict phenomena but cannot truly explain why what happens happens. Underscoring his point that simplicity begets complexity, Wolfram wrote this book in mostly nontechnical language. Any informed, motivated reader can, with some effort, follow from chapter to chapter, but the work as a whole and its implications are probably understood fully by the author alone."

Yes, I own this book and really enjoyed it, what I could understand although it is actually reasonably easy reading an I understood at least the gist of it, if not 80%.

Do I get my nerd badge of honour now

PS I'm in love with my Starboard Carve 111 that I recently purchased. I've got to tell someone.
GreenPat
GreenPat
QLD
4105 posts
QLD, 4105 posts
26 Mar 2008 12:39pm
I think you should win a scale rule and a scientific calculator.
getfunky
getfunky
WA
4485 posts
WA, 4485 posts
26 Mar 2008 2:42pm
GreenPat said...

Who know encriptions?

Is this one meant to be hard or easy?

a=l
b=v
c=x
d=s
e=w
f=d
g=f
h=g
i=u
j=h
k=j
l=k
m=n
n=b
o=i
p=o
q=p
r=e
s=a
t=r
u=y
v=c
w=q
x=z
y=t
z=m



What an enigmatic question..
Haircut
Haircut
QLD
6491 posts
QLD, 6491 posts
27 Mar 2008 2:00am

PS I'm in love with my Starboard Carve 111 that I recently purchased. I've got to tell someone.


so you should be - but use the vent hole dude!! the footstraps are over rated, no matter how damp they are

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