Codebusters C

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Re: Codebusters C

Post by Umaroth »

ET2020 wrote: Wed Jan 29, 2020 8:22 pm Does anyone know of some invitational tests that had an RSA question? The only one I've been able to find so far is Cornell.
MIT had one and I believe Carnegie Mellon.
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Re: Codebusters C

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Umaroth wrote: Wed Jan 29, 2020 8:25 pm
ET2020 wrote: Wed Jan 29, 2020 8:22 pm Does anyone know of some invitational tests that had an RSA question? The only one I've been able to find so far is Cornell.
MIT had one and I believe Carnegie Mellon.
Duke also had one.

Cornell's RSA was kinda dumb due to it not being toebes format. Also Duke's numbers used were too large to feasibly solve with 4 function calcs (it was toebes format tho).

If you want practice I suggest going on toebes and generating your own question. It doesn't really matter if you know the answer, as long as you can get the answer, so invite tests are semi useless for RSA practice.
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Re: Codebusters C

Post by MacintoshJosh »

Name wrote: Wed Jan 29, 2020 9:12 pm
Umaroth wrote: Wed Jan 29, 2020 8:25 pm
ET2020 wrote: Wed Jan 29, 2020 8:22 pm Does anyone know of some invitational tests that had an RSA question? The only one I've been able to find so far is Cornell.
MIT had one and I believe Carnegie Mellon.
Duke also had one.

Cornell's RSA was kinda dumb due to it not being toebes format. Also Duke's numbers used were too large to feasibly solve with 4 function calcs (it was toebes format tho).

If you want practice I suggest going on toebes and generating your own question. It doesn't really matter if you know the answer, as long as you can get the answer, so invite tests are semi useless for RSA practice.
Carnegie Mellon didn't actually have an RSA cipher, just a bunch of funky questions. Also, Duke did have another RSA question that was solvable, if you were wondering ET.

Since the Duke test used Toebes, and it still generated those numbers, should we contact Toebes to maybe limit the digits that the RSA cipher generates?
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Re: Codebusters C

Post by builderguy135 »

ET2020 wrote: Wed Jan 29, 2020 8:22 pm Does anyone know of some invitational tests that had an RSA question? The only one I've been able to find so far is Cornell.
Go into whatever test dump folder you have and search for "rsa". This works for Google Drive at least.
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Re: Codebusters C

Post by jlamslam »

MacintoshJosh wrote: Thu Jan 30, 2020 9:30 am
Name wrote: Wed Jan 29, 2020 9:12 pm
Umaroth wrote: Wed Jan 29, 2020 8:25 pm

MIT had one and I believe Carnegie Mellon.
Duke also had one.

Cornell's RSA was kinda dumb due to it not being toebes format. Also Duke's numbers used were too large to feasibly solve with 4 function calcs (it was toebes format tho).

If you want practice I suggest going on toebes and generating your own question. It doesn't really matter if you know the answer, as long as you can get the answer, so invite tests are semi useless for RSA practice.
Carnegie Mellon didn't actually have an RSA cipher, just a bunch of funky questions. Also, Duke did have another RSA question that was solvable, if you were wondering ET.

Since the Duke test used Toebes, and it still generated those numbers, should we contact Toebes to maybe limit the digits that the RSA cipher generates?
I believe on Toebes you can choose the number of digits you want to make the primes. So I think it's just up to the event supervisor's discretion if they want to be mean or not.
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Re: Codebusters C

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jlamslam wrote: Fri Jan 31, 2020 9:18 am
MacintoshJosh wrote: Thu Jan 30, 2020 9:30 am
Name wrote: Wed Jan 29, 2020 9:12 pm
Duke also had one.

Cornell's RSA was kinda dumb due to it not being toebes format. Also Duke's numbers used were too large to feasibly solve with 4 function calcs (it was toebes format tho).

If you want practice I suggest going on toebes and generating your own question. It doesn't really matter if you know the answer, as long as you can get the answer, so invite tests are semi useless for RSA practice.
Carnegie Mellon didn't actually have an RSA cipher, just a bunch of funky questions. Also, Duke did have another RSA question that was solvable, if you were wondering ET.

Since the Duke test used Toebes, and it still generated those numbers, should we contact Toebes to maybe limit the digits that the RSA cipher generates?
I believe on Toebes you can choose the number of digits you want to make the primes. So I think it's just up to the event supervisor's discretion if they want to be mean or not.
There's no point in making questions that cannot be solved. As most teams are using 8 digit 4 function calculators, all possible RSA questions should be doable with the 8 digit 4 function calculators.
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Re: Codebusters C

Post by ckenn4189 »

Help! I need to know the difference between K1 and K2 alphabets! I just need help with monoalphabetic substitution overall please!!! Can anyone help me? I would really appreciate it!
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Re: Codebusters C

Post by jimmy-bond »

ckenn4189 wrote: Mon Feb 03, 2020 1:51 pm Help! I need to know the difference between K1 and K2 alphabets! I just need help with monoalphabetic substitution overall please!!! Can anyone help me? I would really appreciate it!
As most people would say, the keyword for K1 is in the plaintext while for K2, it's in the ciphertext. I found these pretty easy to understand in you try to make a test on toebes and use the two alphabets to see how it works. I tried explaining it to my teammates but did a terrible job, so I recommend toebes as an explanation.
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Re: Codebusters C

Post by ckenn4189 »

jimmy-bond wrote: Mon Feb 03, 2020 8:01 pm
ckenn4189 wrote: Mon Feb 03, 2020 1:51 pm Help! I need to know the difference between K1 and K2 alphabets! I just need help with monoalphabetic substitution overall please!!! Can anyone help me? I would really appreciate it!
As most people would say, the keyword for K1 is in the plaintext while for K2, it's in the ciphertext. I found these pretty easy to understand in you try to make a test on toebes and use the two alphabets to see how it works. I tried explaining it to my teammates but did a terrible job, so I recommend toebes as an explanation.
Do you think you could walk me through a k1?
https://toebes.com/codebusters/TestPrint.html?test=4
Question number 2 on here
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Re: Codebusters C

Post by jimmy-bond »

ckenn4189 wrote: Tue Feb 04, 2020 1:09 pmDo you think you could walk me through a k1?
https://toebes.com/codebusters/TestPrint.html?test=4
Question number 2 on here
The question you mentioned is not a K1
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