I was reading simon singh's the code book

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Discussion Overview

The discussion revolves around the topic of cryptography, specifically focusing on how to crack different types of ciphers as described in Simon Singh's "The Code Book." Participants express interest in various methods for breaking ciphers, including monoalphabetic ciphers and those using homophones.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants inquire about resources for learning how to crack different ciphers, seeking recommendations for further reading.
  • One participant notes the difficulty in providing advice without knowing the specific type of cipher in question.
  • Another participant discusses breaking monoalphabetic ciphers using homophones and mentions frequency analysis as a potential method.
  • Frequency analysis is suggested as a technique to solve puzzles in the book, with emphasis on analyzing character frequency and context.
  • Some participants express uncertainty about the effectiveness of frequency analysis when homophones are involved, acknowledging that it may require guesswork.
  • There is a request for further elaboration on how to specifically crack ciphers that utilize homophones, highlighting the challenge posed by similar letter frequencies.

Areas of Agreement / Disagreement

Participants generally agree on the use of frequency analysis as a method for cracking ciphers, but there is no consensus on its effectiveness when homophones are involved, indicating a range of views on the topic.

Contextual Notes

Participants express varying levels of familiarity with the ciphers discussed, and the conversation includes assumptions about the reader's prior knowledge of cryptographic techniques.

murshid_islam
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i was reading simon singh's the code book. it describes different systems of cryptography. but what i wanted to know was how to 'crack' different ciphers.
can any suggest anything i can read.
thanks to anyone who can help.
 
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murshid_islam said:
i was reading simon singh's the code book. it describes different systems of cryptography. but what i wanted to know was how to 'crack' different ciphers.
can any suggest anything i can read.
thanks to anyone who can help.

http://search.barnesandnoble.com/bo...serid=tj0WvLUCqf&isbn=0130303690&TXT=Y&itm=7" I haven't gotten very far in it but it does teach several types of ciphers and how to attack them.
 
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I've read that book, what type of cipher are you talking about, the book mentions many types of cipher, its a bit hard to say how to break them without knowing the cipher you had in mind.
 
finchie_88 said:
what type of cipher are you talking about, the book mentions many types of cipher

how do you break the monoalphabetic cipher with Homophones?
thanks in advance to anyone who can help.
 
Are you doing the puzzles at the back of the book? I done them

The way you solve that is to use frequency analysis on the characters in the "sample", then you can use that to guess what symbols stand for what. It helps if you look at the frequency of the characters before and after each character, since vowels are found before and after almost anything, but constanants are slightly less 'social'.
 
finchie_88 said:
Are you doing the puzzles at the back of the book? I done them

The way you solve that is to use frequency analysis on the characters in the "sample", then you can use that to guess what symbols stand for what. It helps if you look at the frequency of the characters before and after each character, since vowels are found before and after almost anything, but constanants are slightly less 'social'.

i was talking about the "homophones". is it possible to crack it using frequency analysis?
 
Yes, its harder than without, but you can still do it when there are homophones involved. It just requires a little guess work.
 
finchie_88 said:
Yes, its harder than without, but you can still do it when there are homophones involved. It just requires a little guess work.

could you please elaborate a little. what i want to know is how to crack the cipher with homophones. because if we use homophones the frequency of all the letters are almost same.

thanks
 

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