Codebusters B/C

Test your knowledge of various Science Olympiad events.
thewaterymellen
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Re: Codebusters B/C

Post by thewaterymellen »

IMAGINATION!
here's a 2x2 hill cipher using the key HELP:

UPQVFHSPZM
Last edited by thewaterymellen on January 24th, 2022, 4:27 pm, edited 1 time in total.
TCHS '24

2019: Heredity, Fossils, WIDI
2020: Heredity, Fossils, WIDI
2021: Designer Genes, Protein Modeling, Codebusters
2022: Cell Biology, Codebusters, WIDI/WICADI
2023: Cell Biology, Green Generation, WIDI
awesomeaidan123
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Re: Codebusters B/C

Post by awesomeaidan123 »

 STARLIGHTZ 
Unsure if I'm right, but here's a caeser with an unknown shift
"ocz ncdao rvn adqz"
AJ27
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Re: Codebusters B/C

Post by AJ27 »

Answer to the caesar cipher:
Plaintext: "The shift was five."
Here's a quote by Albert Einstein encoded with a Vigenere Cipher with key "random":
Cish we cixh fuuiaj o nzclfzq. Ko xhsb pohu pmcaafs, kfu zxgf bers aamiaj.
2022 States Div B: Anatomy & Physiology 2nd, Codebusters 8th
2022 Nationals Div B: Anatomy & Physiology 9th :), Codebusters 37 :|
2023 States Div B: Anatomy & Physiology 2nd, Crave the Wave 2nd, Dynamic Planet 1st, Codebusters 6th
2023 Nationals Div B: TBD...
Kanji
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Re: Codebusters B/C

Post by Kanji »

Life is like riding a bicycle. To keep your balance, you must keep moving.
Here's a popular cipher where the plaintext is "kcabsretteleerht"
Zh'uh qr vwudqjhuv wr oryh
Brx nqrz wkh uxohv dqg vr gr L
D ixoo frpplwphqw'v zkdw L'p wklqnlqj ri
Brx zrxogq'w jhw wklv iurp dqb rwkhu jxb
L mxvw zdqqd whoo brx krz L'p ihholqj
Jrwwd pdnh brx xqghuvwdqg
Qhyhu jrqqd jlyh brx xs
Qhyhu jrqqd ohw brx grzq
Qhyhu jrqqd uxq durxqg dqg ghvhuw brx
Qhyhu jrqqd pdnh brx fub
Qhyhu jrqqd vdb jrrgebh
Qhyhu jrqqd whoo d olh dqg kxuw brx
AverageIsotelus
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Re: Codebusters B/C

Post by AverageIsotelus »

We're no strangers to love
You know the rulesand so do I
A full commitment's what I'm thinking of
You wouldn't get this from any other guy
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Here's an Aristocrat from another song often used in memes:
VBU TYU GU IQPVU TI EUVVTKE OFUVVX VBTK
VBU GPVUF'I EUVVTKE GPFN IA XAR NTEBV PI GUSS IGTN
awesomeaidan123
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Re: Codebusters B/C

Post by awesomeaidan123 »

the ice we skate is getting pretty thin. the water's getting warm so you might as well swim
Here's an affine: Last 2 words are "it is"
Gahz chmf hz chvf d zbhjjhqt exxc. Pxn yhuf hqgx gaf bdgfs, kng pxn rdq’g zff axb yffe hg hz.
AJ27
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Re: Codebusters B/C

Post by AJ27 »

My answer to the affine cipher:
Plaintext: "This life is like a swimming pool. You dive into the water, but you can't see how deep it is."
Here's a quote by Maya Angelou encoded with a 2x2 Hill Cipher with key: WORK:
Oxwdugy ksme rasg gytcoe aqw cj.
2022 States Div B: Anatomy & Physiology 2nd, Codebusters 8th
2022 Nationals Div B: Anatomy & Physiology 9th :), Codebusters 37 :|
2023 States Div B: Anatomy & Physiology 2nd, Crave the Wave 2nd, Dynamic Planet 1st, Codebusters 6th
2023 Nationals Div B: TBD...
awesomeaidan123
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Re: Codebusters B/C

Post by awesomeaidan123 »

I may be doing something wrong, but I'm pretty sure the matrix is tell them matrix is not invertible, so its not solvable.
AJ27 wrote: April 2nd, 2022, 2:55 pm My answer to the affine cipher:
Plaintext: "This life is like a swimming pool. You dive into the water, but you can't see how deep it is."
Here's a quote by Maya Angelou encoded with a 2x2 Hill Cipher with key: WORK:
Oxwdugy ksme rasg gytcoe aqw cj.
AJ27
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Re: Codebusters B/C

Post by AJ27 »

Sorry! Didn't realize that 8 and 26 aren't coprime!
Try this one:
Encoded Using Morbit Cipher:
2 6 1 1 7 8 3 8 2 6 5 6 1 6 2 3 8 6 5 6 6 1 1 7 7 4 9 2 7 1 8 2 7 1 9 4 3 5 6 8 2 6 5 6 1 6 7 5 7 6 4 8 9 2 9 2 4 7 3 3 4 4 7 9 5 6 1 4 9 2 8 1 7 1 6 1 8 2 3 3 7 3 6 7 3 1 3 7 6 8 6 3 2 3 3 7 2 3 5 6 2 3 5 7 6 2 1 7 3 6 4 5 9 1 8 9 4 3 5 6 3 1 3 4 9 6 8 6 2 8 8 7 7 4 9 1 7 2 3 8 2 6 5 6 1 6 7 6 4 7 1 7 5 7 7 4 9 4 5 7 7 1 9 5 6 2 3 8 3 5 6.
Knowing the following partial key:
1 = OO
2 = O-
8 = x-
9 = xx
2022 States Div B: Anatomy & Physiology 2nd, Codebusters 8th
2022 Nationals Div B: Anatomy & Physiology 9th :), Codebusters 37 :|
2023 States Div B: Anatomy & Physiology 2nd, Crave the Wave 2nd, Dynamic Planet 1st, Codebusters 6th
2023 Nationals Div B: TBD...
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random-person
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Re: Codebusters B/C

Post by random-person »

"When your mother asks, "Do you want a piece of advice" it is a mere formality. It doesn't matter if you answer yes or no"

here's an aristocrat to continue:

“XTKR OXN ZQGR RUDIXLRV Q PRQL, CS HRKXARF IRFF SRLLCPOCTY. DQLS XP KXNLQYR KXARF PLXA RUSRTVCTY XNL

JTXBIRVYR.” -Duke Leto Atreides
Last edited by random-person on April 15th, 2022, 12:21 pm, edited 1 time in total.
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