Unanswered Questions
90 questions with no upvoted or accepted answers
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Cryptogram with one frequent letter and other letters random
I arrived at this ciphertext as a result of a particular decryption step from the famous unsolved "Kryptos 4" cipher. It has a very unusual letter distribution:
?...
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Decode this message to stop the destruction of Science!
An extremist religious organization called "The Redeemed Against Scientific Usurpation of God's Authority", or RASUGA, have converted the world's leading time travel researcher to their ...
CommunityBot
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What are sequences of letters/symbols for creating a cipher?
I have two gears with different numbers of teeth (20 and 10):
The small gear makes two turnovers, while the large gear makes one turnover only.
My idea is to use a large gear as an alphabet wheel (...
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Questionable Cipher
I have received a rather peculiar cipher and in all my years of crypto, I have never seen a cipher like this. The cipher is Numeric, Uppercase mixed with Lowercase. The only hint I'm given is "Capital ...
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RO:09-RI:10-PO:05-PI-22
One of my friends who is good with cyphers and puzzles challenged me to solve this one. I think it reveals a name, or date or some information with which he can surprise his friends. I couldn't find ...
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Decoding ciphertext with base64 yields obscure unicode
Context: I was given a piece of encrypted string to decipher and I have been stuck at it for a while. To not ruin the point of the problem, I will provide only some description of the text and my ...
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AWS Quest - First Clue
AWS are hosting a puzzle hunt: https://aws.amazon.com/awsquest/ - the first clue is here: https://twitter.com/jeffbarr/status/972382654682120192
The only thing we have to Amazon Sphere is Sphere ...
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What's this message? It should be in italian
I received a challenge, deciphering "cgo feco a atm", the result, if a sentence, should be in Italian. I've tried the ceasar cipher without success, maybe you can help? Thanks!
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What did the Iranian commander order?
It's the fictional Iran-Turkey war.
The Iranian commander is ordering his troops. He encodes his order in their own language:
۶۶۰ ۶ ۲۰۱ ۲۳۳
What did he order?
Note ...
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Artist puzzle/ARG: "The key is: 33.60d813551512431"
A Greek singer/trapper has a website with his name on it that's very cryptic. I'm linking the website here https://sinboy.gr . There are a few things that are strange but I would like to focus on the ...
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Find a key in a matrix of numbers
I have following matrix and I need to find a key from that. The key should probably consist of 1-8 lowercase letters or digits. I have basically no hints how to find the solution or what exactly the ...
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168
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Trying to de-code "dsetg nvxgn..."
The code is:
dsetg nvxgn abfus fcaur vvkyq llszs yybik pkefa vbyjj stalk aupoc dvyai qnlrj iewzb qfcct mgqrg xxuqy sapeb reahl btxbz wisfd klbqr letxa zhu
I've run it through a bunch of ciphers and ...
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Good cipher with a "password"?
I'm starting to create a puzzle, but I'm going to need a cipher that will be impossible (or at least very difficult) to crack, but can be easily decoded with a key. I first looked at the one-time pad ...
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Poem coding scientific constants
The following Vogon poem contains various mathematical, scientific and cosmological numbers. There are ten. Can you find them? Credit for partial solutions.
A BTAUJV BTA ALEJM AV EUMJM FAV EATR O
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