Codebusters C

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Re: Codebusters C

Post by Vortexx » February 19th, 2019, 5:27 am

linzhiyan wrote:
Name wrote:
linzhiyan wrote: Hmm... This seems to be exactly the opposite of what the Warrensburg test was like... (Besides the fact that they had a wide variety of codes- 2 aristocrats, 1 affine, 1 atbash, 1 caesar, 1 vigenere, and 2 hills).
That's not even a variety... No patristocrats or xenocrypts or bacon
^exactly
At an invitational, there was like 12 aristocrats/patristocrats on there. Needless to say, we didn't finish the test.
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Re: Codebusters C

Post by TheWood » February 20th, 2019, 2:46 pm

Do you guys have any tips for solving the Spanish question? Nobody on my team is a native speaker and out of the three people on the team for code we only have one taking spanish. Additionally, how do you guys use the four function calculator? I feel like whenever I use it I’m prone to mistakes.I only use the calculator for RSA and even then I avoid it if the numbers are small enough. I appreciate any advice y’all can give me!
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Re: Codebusters C

Post by dragonfruit35 » February 20th, 2019, 9:26 pm

TheWood wrote:Do you guys have any tips for solving the Spanish question? Nobody on my team is a native speaker and out of the three people on the team for code we only have one taking spanish. Additionally, how do you guys use the four function calculator? I feel like whenever I use it I’m prone to mistakes.I only use the calculator for RSA and even then I avoid it if the numbers are small enough. I appreciate any advice y’all can give me!
For xenocrypts, memorize the letter frequency order (EAOSRN, and E and A are very close in frequency, unlike in English, where E is by far the most common letter). I usually start by looking for some of the smaller words (el, la, que, de, etc), then seeing if any of the longer words start to come together. I’m not a native Spanish speaker, but I did take 3 years of Spanish, and this strategy seems to work alright for me. Hope it helps :D
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Re: Codebusters C

Post by Anonymous15 » February 20th, 2019, 10:00 pm

What does toebes mean?

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Re: Codebusters C

Post by Vortexx » February 20th, 2019, 10:03 pm

Anonymous15 wrote:What does toebes mean?
its a website that you can use to make codes.
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Re: Codebusters C

Post by waterlubber » February 23rd, 2019, 8:30 pm

Anyone know about "ideal" calculators? Basically, the most digits (and with a memory, hopefully) that you can cram into a four-function. RSA is...calculationally demanding, to say the least.
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Re: Codebusters C

Post by UTF-8 U+6211 U+662F » February 23rd, 2019, 9:20 pm

waterlubber wrote:Anyone know about "ideal" calculators? Basically, the most digits (and with a memory, hopefully) that you can cram into a four-function. RSA is...calculationally demanding, to say the least.
I don't do this event but what part of the RSA are you using your calculator most for? It seems like given small primes, it shouldn't be that bad

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Re: Codebusters C

Post by jimmy-bond » February 23rd, 2019, 11:42 pm

On a practice test, I had the question "Encode DREW BREES using the keyword VEAR." It displayed VEAR as a 2x2 matrix, so this is clearly a Hill cipher problem. I tried encrypting it as I would a normal Hill cipher but got a different answer than the answer key. I'm pretty sure I did it wrong, so can someone explain to me how to do this problem and the solution you get? Thanks.
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Re: Codebusters C

Post by Anonymous15 » February 24th, 2019, 7:43 am

Thank you all for your answers to my questions from before!

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Re: Codebusters C

Post by dragonfruit35 » February 24th, 2019, 8:04 am

jimmy-bond wrote:On a practice test, I had the question "Encode DREW BREES using the keyword VEAR." It displayed VEAR as a 2x2 matrix, so this is clearly a Hill cipher problem. I tried encrypting it as I would a normal Hill cipher but got a different answer than the answer key. I'm pretty sure I did it wrong, so can someone explain to me how to do this problem and the solution you get? Thanks.
Which way did you write the DREW BREES matrix? With the letters readable horizontally or vertically?
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