Unanswered Questions

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 ...

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 ...

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 ...

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 ...

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!

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 ...

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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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 ...

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 ...

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

I looked up those two ciphers and decided to make a twisted combination of them, here are some of the steps I followed: use the bifid cipher; go to the RIGHT by 2 on AZERTY keyboard (on B and N go ...