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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Help With Dan Brown's Unsolved Puzzle

Dan Brown has an unsolved message on his website https://danbrown.com/ There are hidden symbols on 5 JPG images and 5 PNG images that overlay the JPGs. JPG Images: int1.bg.jpg, int2.bg.jpg, int3.bg....
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711 views

Open the curtains

Open the curtains to reveal some words of wisdom: ...
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What's up with these words, eh?

hello there = llehht oere Voldemort's Wrath = dloVrome s'ttarWh This is weird, right? = sihT si riewr ,dthgi? Just figure out what is happening to these words. = tsuJgif eru tuotahw si ppahnineot ...
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148 views

Decipher the language

An alien planet called EMJ-26 has an alphabet that has letters switched around. Their language is identical to english but they use different letters. Here are the names of some countries on earth ...
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1answer
93 views

Wait a minute…Where did he go? (part 1)

A secret person hid three rolls of paper under my bed First roll: you'll find my country only if you solve this puzzle '3rd of 2, 1st of 2, 2nd of 6, 3rd of 2, 1st of 3, 3rd of 2' Second roll: you'll ...
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586 views

The physicist's puzzle

An unknown physic1st left behind this puzzle with his belongin9s and he can no longer Be found. Here is the puzzle he left with u5 before disappEaring. Can you figure who this mysterious physicist was ...
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179 views

The Case of the Poisoned Poet

I was in my office, trying to officiate a disagreement between Misters Jack Daniels and Jim Beam, when the dame walked in. She wore a slinky dress and glasses so dark all I could see in them was the ...
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1answer
301 views

It's your turn now!

What is the simple rule behind these three relations below? $F$ $\rightarrow$ $C$ :: $R$ $\rightarrow$ $I$ $\rightarrow$ $\sqrt{F}$ :: $IA$ $\rightarrow$ $D$
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Where does my friend live? 5

Other questions in this series can be found here. One of my friends, Com, has sent me a code to show where he lives: ARIA, ---, ---, ESIA, ---, KAAN, KYAN, LAIA, ---, MOVA, RUIA, TAAN, TUAN, UKNE, --...
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392 views

What are these holes in my Connect Wall?

An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls "Why on earth are there blank spaces in your connect wall?" "In my defense, you just asked me to make categories ...
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201 views

The Painted Barcode

Someone spilled paint on what looks to be some sort of barcode, although I am not entirely sure that's what it is. Can you figure out what the original message may have been? Hint 1 Hint 2 Hint 3
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A (cipher?) puzzle in a YouTube video description

So, by chance I stumbled upon this video: MASTER BOOT RECORD - C:\DEFRAG that contains the following puzzle in the video description: 066 097 099 107 119 097 114 100 032 097 110 100 032 102 111 114 ...
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Simple letter subs with a twist!

Here's your typical letter substitution puzzle that you can solve, no tricks. But even so, there's a twist! Decipher this and find out the hidden message! xhtm tm ytxeanyyq nofxhea wdccye mf jerfje ...
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Try to decipher this puzzle; It's cipher is historical

A individual known for Polygraphiae... Gpqg atxr bqocq, ucl tzv rip gkmv iu ydw ynpa nkdk? Gvxi jamy dj przcl Gagmguon sd droabp, jxughv rge cgvx! Luvl fycw! If too hard, ask for a clue and you will ...
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107 views

Rune Ciphertext (Presumably multi-enciphered )

Here is a cryptogram: Note: this is not, very very hard. But still, it is not very very easy, I would want to say with a few clues it's more easy than hard: Clues: It can be simple substitution. It ...
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Crypted Gobbledygook, Decrypted Obvious

When it is crypted, it is gobbledygook, when it is decrypted everyone who reads it here understands! zorrqpxj gzu fuebmtvbkexjt gzu baq Happing decoding :)
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243 views

Masyu puzzle with secret code

What secret code is hidden in this masyu puzzle? Note: The regions marked with x are not to be drawn
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205 views

Who fulfills the logic?

Imagine you are on a spaceship. To activate this machine, you have to enter a code with these given clues. 1110C1742 0110F1230 1001B1126 -------------- You have to enter the fourth code using one of ...
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161 views

Pigpen cipher makes no sense

My father in law made a pig pen cipher. Gave me a coding matrix and I know the message is spelled backwards but I still can’t figure it out. Can someone help?
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123 views

A Word + Number Puzzle

This is a code: 27 15 68 28 29 16 said that '53 95 62 18 65 92 22 19 7 8 74 102 90 49.' What is the secret behind?
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Tubariphobia - The fear of pickles

There are many topics that polarize. But not a single topic comes close to the one and only age-old question that some claim is the root of all division between people: "Are pickles disgusting or ...
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308 views

Kaboom-y numbers!

Here is a new type of puzzle poem I made. Enjoy! Note: The title is named like that for a reason. I have a number in mind, it is super cool, But there's something you need to know, or you will find ...
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An eye for style

My colour-blind friend and I play in the same Dungeons and Dragons campaign. Our party had just died in a horrendously managed battle against a dracolisk (seriously, don't ask!) and so we were back to ...
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555 views

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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258 views

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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156 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
116 views

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 ...
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353 views

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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1answer
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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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1answer
87 views

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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138 views

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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295 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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378 views

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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277 views

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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296 views

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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1answer
281 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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628 views

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, ...
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1answer
105 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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1answer
94 views

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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2answers
141 views

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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84 views

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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324 views

Can you crack this multiple-shift cipher?

The below is the cipher that is to be cracked : ...
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180 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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