Questions tagged [cipher]

A cipher is a simple method of modifying messages to make them unreadable, but still possible to recover. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other ciphers include polynomial ciphers such as Playfair, Foursquare, etc.

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Following Rotting Links

Here's some examples of rotting links. Why are they rotting, and what links them? Lebanon - ROT -> Slovenia Monaco - ROT -> Slovenia European Union - ROT -> Slovenia - ROT -> Antarctica ...
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There is a poem hidden in this puzzle. Can you solve it?

Гӓд ӓв aӱӑ фɑҙӑз, нӑӱн ӓв ӑӱлд, Лӧд ӑӱвӑр aӱӑ фɑфләң хйuмӑн рёс, Бӥнiҫ хuз iтɜнл лӧ в̈i хӑӱлд ...
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132 views

A bird-brained cipher

Today my partner, an avid ornithologist who I swear spends his whole day looking at codes and tables online, left me this cryptic clue when I asked where he had been all day. He complained about a ...
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Can you help to secure the sky?

You sit in an airplane high up in the sky, happy to be able to travel again. All of the sudden the man next to you dies. Don't panic! You see pen and paper on the tiny desk in front of him. There is a ...
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Dashed number cipher

74393-493-71335-34393-1-83457102-377-13-57111-40129-3447-1-00-420-50371335-1-93057104-377-13-207-0340-737 Disclaimer: This cipher is not mine, but it was interesting and I managed to solve it. Credit:...
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4answers
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New word from a rotation function

In the Caesar cipher a word is encoded by rotating the letters in the alphabet a given number of times, $N<26$. A word is the smallest sequence of phonemes that can be uttered in isolation with ...
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Can you provide a hint on how to solve this Hex Cube puzzle?

I've been tackling this puzzle named "Hex Cube" which comes with the instructions "Can you decipher the message? You should be able to if you go back to basics and use a little bit of ...
7
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Cryptic images have been posted around University of Central Florida campus. Can you help crack the cipher?

Recently there have been sightings of images duct-taped to various poles and such, reminiscent of a large house with windows within the UCF campus. On closer inspection, there is obviously a cryptic ...
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Help me with my friends code?

My friend has asked me to decrypt his code but I haven’t been given any clues and I was looking to see if any one could help me crack it. The code is: ╔á╔ª56╔áãÆ╔á╔ª56╔áãÆãÆ45╔áÓ½«2ãÆ45╔áÓ½...
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Always remember this one thing

After a particularly rough day, Ann went to her abuela for advice. Being rather cryptic, her grandmother provided her this picture and said, "The blocks are always happy, because they remember ...
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Covert Conversation - A North Daniels' Puzzle

It's very important to keep your login details secure, which might entail not writing it down, encrypting them, or using a password manager. What you should not do is save them on some random USB and ...
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Can you get to the final message?

I am unsure of the difficulty of this puzzle, but feel free to give it a try My prefix is almost dissolved My infix is an array My suffix forms nouns of action I am the key t nwl i queyh v Since it'...
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1answer
278 views

Sorry, I'm new. to this SE

spoil the unlukcy number for this text fbeel, V'z arj fb gvuf jvyy or fchre rm. 3 > 4 and 4 > 3 ^\w|[A-Z]|[^w](?=i) is the whole clue minus a letter. Find it ...
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Playing with a chess cipher

Alice and Bob both love encryption, and Alice loves to play chess. Unfortunately, Bob isn't very good at chess, so he doesn't think it's very fair to have to play the game for real. So instead of ...
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Can you help me recover this message?

So, in May 2018, a friend and I were sitting in study hall, bored. Both of us had finished our homework early, and we were trading ciphers over email. I sent something that I had encoded, and neither ...
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A weird chess game

Hello everyone, and welcome back to one really crazy game that was played during the lunch break within a dutch prison. It's an inmate with the white pieces against ...
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264 views

This stylization needs a name!

Although I have been toying with this idea for a while, posting it in this form was inspired by @Stiv's "needs a name" puzzle series. I didn't come up with this cipher, but I have never seen ...
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3answers
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Find your way through the five rings

I am trapped in a cage full of animals and all exits have been sealed. At the end of a long path, there is a sealed six-foot iron gate with 5 rings as shown below. Each ring contains floating letters, ...
3
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1answer
100 views

Can you discover who I am?

I made my first puzzle for PSE! The string below is an encryption for the enigma to be solved. In order to find the answer you must: Discover what the dots and zeros translate to; Find the answer to ...
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A Mathematical Cipher [cIosed]

Closed. This question is off-topic. It is not currently accepting answers. 💡 Want to improve this question? Update the question so it's on-topic for Puzzling Stack Exchange. Closed 1 second ago. ...
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This one is definitely going to be harder! (Binary?)

here you go? This is a LOT to decode ...
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Not so Simple? Substitution Cipher

Once more the shores of the island of Pohnpei have been the scene of strange fogs, strange smells, and equally strange newly discovered carvings. The previous carvings have widely been thought to be ...
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binary to be decoded (HARDER)

Below is binary but its translated from something else i dont think a binary to text editor would work 00110001 00110010 00110100 00100000 00110001 00110101 00110000 00100000 00110001 00110101 ...
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To be decoded (BINARY)

Look at this image using a pixel editor. Black is 0, white is 1 and red is end of statement
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Simple? Substitution Cipher

The following was carved into the cliffs along one shore on the island of Pohnpei after a strange fog had engulfed the island. Even stranger sounds emanated from the fog before it dissipated slightly ...
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1answer
315 views

Can you crack this multiple-shift cipher?

The below is the cipher that is to be cracked : ...
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176 views

Decrypt the Killer's Letters

You work at a police department, and are currently investigating a serial killer who is taunting police with encrypted letters. He has promised three extremely deadly attacks still to come, and has ...
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321 views

Ah, c'est Ray!​

For many years, I have been writing to a pen-pal in France. In his latest letter, he said that he had something to give me so we should meet in person. I knew that Laurent dabbled in some composing ...
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641 views

My friend's letter

I received a letter from a friend yesterday, and thought I would share it here. Here's what it said: I hope you're keeping well. It was nice to hear from you the other day. I finally figured out your ...
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119 views

Can you crack this mod of the Caesar cipher?

I want to know how secure/insecure my implementation of the Caesar cipher is... Ciphertext to decrypt : ...
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What did my uncle want to write?

I've always been a writer as well as a puzzler, and my uncle shares that same fascination with both. Recently, he shared with me a complex puzzle that he'd made when he was my age. He said that the ...
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357 views

My position is higher than yours!

General: I 41v9 p5w96 5v96 y52 b9c12s9 I 1m 1234567890. Soldier: Understood. What did the general say?
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Audio Steganography

A simple question, without a simple answer. Rome would be the obvious answer, but it is not THE answer. A picture contains a 1000 words, this audio contains one. https://youtu.be/HiH4_A0xq40 If you ...
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Can you solve this Rubik's cube from inside of it?

You have woken up to find yourself trapped in what appears to be a giant Rubik's cube. A Rubik's Cage I suppose. Bewildered, you take a look around (better video on imgur or just click the photo). ...
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2answers
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Place of Safety - A North Daniels' Puzzle

It's not everyday you get a text from a dead friend, especially if you saw them being executed by guillotine, which is why D.S.I North Daniels was a bit sceptical when his ancient Nokia Cityman 1320 ...
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186 views

What is the answer on?

x = r("k") y = l("ft") z = x("t") The answer is on the x(y(z("i36g9q4e"))) hint
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Great Caesar's ghost, I smell Bacon

This should be relatively simple for you guys. Spaces and punctuation do not count towards the answer. It's a quote from a character in a TV Show, but that has nothing to do with what the answer is. ...
11
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270 views

Fun with ^#**#!@ flags

(h/t to @sarsaparilla and that user's Fun with Flags series of puzzles earlier this year) "Hi Pat." "Hey, did you get my note about our next trip?" "If by 'note', you mean '...
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Can you crack my cipher?

Can you crack this cipher of mine? Each 6×6 box is a word; therefore there are 26 words. All words are English. The text is read left to right, top to bottom. As might be guessed, the 36 squares per 6×...
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2answers
174 views

Geocache mystery story with a coordinate as the answer

I'm trying to do my first geocache and I'm having some trouble. I would appreciate if someone could provide some more hints for me (please put the answer in spoilers). The geocache is a puzzle that is ...
16
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335 views

A Cousin's Code: Settle It!

So I have a younger cousin who's been hanging out with a group of other teens recently. Unfortunately, my cousin is at the stage where they don't want to talk about their friends to their parents, so ...
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Where is the gold?

I made a puzzle, but it's probably bad¯\ _(ツ)_ /¯. Here goes. (CRINGY POEM WARNING) The fallen leader spread a plague that turned people into the undead. He got tricked by Xavier Fisher, who took all ...
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Help me translate this encrypted message

The message is: TFNBdUxpNHVJQzR1SUM0dUxpQXZJQzR1SUM0dUxpQXZJQzR0SUM4Z0xpMHRMU0F0TFMwZ0xpNHRJQzR0TGlBdExpQXVMU0F1TFM0dUlDNHRMaTB1TFNBdklDOGdMaT ...
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The trip of a lifetime… but to where?

Your best friend Alex is great, but she's a bit too into puzzles for your taste. Today, she sent you a package. It included a letter informing you that she’s planned the adventure of a lifetime for ...
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This encoded code is the code that encoded the code

This gibberish is the source code of what you use to encode and decode it. I'm curious if anybody can decode it and give me the original source code! I'm placing a decent bounty on this in two days ...
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I bet u can not find the word/phrase hidden in this post!

there Is a word/phrase Nefariously inserted into this question/post. Can you find it? i do indeed hope this puzzle will fasinate you Or at least Retain your interest for a while! i Really enjoyed ...
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A maze, a statue, and a riddle

Hints at bottom John and Jeffrey had been friends for a long time. After meeting at Fort Bragg and serving in the military in the 60's, they had always remained close, even living in the same town ...
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218 views

How to solve this mind boggling puzzle

I found this puzzled unattributed in one of my Facebook groups. I've been trying solve this puzzle for 2 hours, but I still no idea at all. I really need help. Any guess would really appreciated.
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Three part chess problem

Three separate puzzles: ...
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166 views

Find the next term of the sequence

I created this puzzle. Find the next term of the sequence. cjJxa2JyMS9wcHAxcHBwcC8xTjJibjIvQjFucFEyTi8zUDQvOC9QUFAxUFBQUC8xUjFLMUIxUg== ...

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