Codebusters C

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Re: Codebusters C

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18ish moderately difficult questions is about the limit for number of questions that can be solved (but also depends on test content. If its aristo heavy, maybe more, if it's like RSAs, Bacons, etc then less)

https://www.printable-puzzles.com/print ... ograms.php has excellent printable cryptograms. I don't think enough people know about this.

Placing really depends on comp. A solid time bonus (idk 3 min ish) and a decent test should place almost any comp.
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Re: Codebusters C

Post by ckenn4189 »

In normal mono-alphabetic subs, do you have to fill in the blanks in the replacement table?
Like this
a b c d e f g h
fq 1 7 1 5 2 6 4
rp v a x u f i d

Do I need to fill in that g
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Re: Codebusters C

Post by dragonfruit35 »

Nope, you're not required to fill out the frequency table - it's just there to help you!
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Re: Codebusters C

Post by Mr.Epithelium »

Do you guys have any tips on how to tackle misspelled aristocrats?
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Re: Codebusters C

Post by Umaroth »

Mr.Epithelium wrote: ↑Fri Mar 06, 2020 6:35 pm Do you guys have any tips on how to tackle misspelled aristocrats?
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Re: Codebusters C

Post by mangomousse »

ckenn4189 wrote: ↑Fri Mar 06, 2020 10:14 am In normal mono-alphabetic subs, do you have to fill in the blanks in the replacement table?
Like this
a b c d e f g h
fq 1 7 1 5 2 6 4
rp v a x u f i d

Do I need to fill in that g
Do you mean on a test? Because you normally won't get points off for leaving things blank on the replacement table and if the frequency for g is already blank that means there weren't any g's to begin with in the ciphertext so there wouldn't be anything to fill-in.
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Re: Codebusters C

Post by jlamslam »

Mr.Epithelium wrote: ↑Fri Mar 06, 2020 6:35 pm Do you guys have any tips on how to tackle misspelled aristocrats?
In general, I find that they can be mostly solved using normal aristocrat strategies. Sometimes it helps memorizing common mispellings, one that's come up for me a lot is "EYE" instead of "I".
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Re: Codebusters C

Post by moleabbu »

For the State tournaments, manual says that you have to know how to do cryptanalysis on vigenere and affine ciphers with "crib" of a certain amount of letters. Can someone explain what this means?
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Re: Codebusters C

Post by jimmy-bond »

moleabbu wrote: ↑Sun Mar 08, 2020 8:43 am For the State tournaments, manual says that you have to know how to do cryptanalysis on vigenere and affine ciphers with "crib" of a certain amount of letters. Can someone explain what this means?
This means that they provide the ciphertext as always, but now they give you x amount of plaintext letters. For Vigenere, you use this to determine the key. For affine, you use these letters to calculate the values for a and b.
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Re: Codebusters C

Post by MoMoney$$$;)0) »

jimmy-bond wrote: ↑Sun Mar 08, 2020 10:18 am
moleabbu wrote: ↑Sun Mar 08, 2020 8:43 am For the State tournaments, manual says that you have to know how to do cryptanalysis on vigenere and affine ciphers with "crib" of a certain amount of letters. Can someone explain what this means?
This means that they provide the ciphertext as always, but now they give you x amount of plaintext letters. For Vigenere, you use this to determine the key. For affine, you use these letters to calculate the values for a and b.
You can use either one.
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