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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17
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2answers
876 views

Half an awful haiku

Attempt to find the last word: Cheryl nowhere errs She ebbs one or nag envy Aha flap green gel Purely abjurer reef Fur roof bar be ant rail Nun sync terra ???
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The Etiquette Room

This puzzle can be solved as puzzle on its own, but its solution is also part of Deusovi's Community Metapuzzle. You wake up feeling rather dazed. Your head is pounding. Whatever just happened did ...
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Dungeon Crawler: Level 1

You are the protagonist in a game designed by NeedAName Inc. Proceed through the levels using your video game knowledge to solve the puzzles therein. Solve all levels and beat the game! Level 1: ...
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2answers
697 views

What Does Igor's Letter Say?

Igor arrived at the national convention of scientists with a bit of a conundrum. "My boss gave me this message," he tells his associates, "but says he can't for the life of him figure out what it says....
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Why Do You Love Me?

An entry in Fortnightly Topic Challenge #35: Restricted Title 1. I met an amazing girl today. Not only is she smart and share my love for art, she also really like puzzles! However, when I asked her ...
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3answers
463 views

Cryptic Chain #1

Each cryptic clue yields the keyword to the next, terminating in a message to you, gentle puzzler. With the exception of the first, which requires a little lateral thinking, all the clues are standard ...
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Staff Party, can I go?

So, there's a really cool professor at the college I'm starting to teach at. He throws pretty awesome faculty parties every month, but you can only get in if you are able to figure out the password. ...
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The strange SMS (Part 2)

Thanks to all of you, I know now what my friend was telling me (see part one). We continued talking via Skype. After some nice messages about the utility of iron in our society, we decided to meet in ...
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2answers
512 views

I tend to forget things

I tend to forget things. The only thing that keeps my memories alive is dreaming. During the day I listen to all that is said to me, but in the evening I already forget it. But when I fall asleep all ...
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1answer
934 views

Where Is My Friend?

A friend of mine, one of those world-traveler, rugged outdoorsman, live-out-of-a-tent-and-backpack sorts, has just sent me an interesting email:   ...
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471 views

Michel's mysterious message

The following text-message exchange took place yesterday between me and my friend Michel: M: Çorâ ârb fyk! Çî bwæ rœt nœ mæ þœśol? Ap kôx so śêm am śêmipat ø jûp? Aś wæ śadwol ap îp lakrœ am tœmb! ...
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1answer
785 views

What is my name? Simple puzzle

I am a chemical element .---- ----- I am your ..-. .-. .. . -. -.. Combine them together now I am a country What is my name?
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427 views

Save the Eggs! - An Angry Birds Puzzle (Part 1)

You’re going on a fictional world tour. YAY!!! Your first destination is the world of Angry Birds. Sub-part 1 When you reach Bird Town, all the birds have a party to celebrate the arrival of the ...
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3answers
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Number 1 Mission

When Inspector Kit was just a little kitty, she desperately wanted to be a spy - jetting off to foreign countries, thwarting international diamond thieves. And now the big day has arrived - her very ...
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1answer
1k views

What's Happening on my Vacation?

I'm on vacation right now! I left on the 13th in celebration of my birthday! It was a long flight so I brought along some reading material: ...
7
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1answer
491 views

Difficulty judging difficulty

Ok, so I run a play-by-post RPG campaign and I have the following "puzzle" set out for the group. My main worry is that they won't get it so I figured I'd try it here first. Other than solving it, I'd ...
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No Christmas presents until you solve this!

This morning I received an email from Santa Claus himself. He wanted to tell someone about the problems he’s facing and chose me. When I read about his problems I was worried because I like my ...
7
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2answers
494 views

Rendez-vous with your eccentric uncle

Your eccentric uncle is a world-renowned cryptologist and he sees in you a high potential to follow in his footsteps. You are of course very flattered and can't wait to get going with the special ...
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2answers
726 views

The Hyper-Modern Kidnapper: Crime Scene #4

The Story: As soon as he read the message that Lipwig found, Sergeant Vimes raced home, sirens blaring for traffic to move aside. His daughter was home in her room. His daughter was home in her room. ...
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276 views

Finding Rogue Kitty II

Having been met by a group of very unhappy bosses at Kitty is being 'returned' to the staff car when suddenly there is a commotion and she makes a run for it. As they chase her, little old ladies ...
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1answer
489 views

difficile est saturam non legere

Well, my last question wasn't received that well, nevertheless I will make a better one, besides you will need all the answers you can get. vcejssnr Now I can't leave you with a stupid cryptogram ...
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1answer
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Room 213: Because of the Reindeer

Credit: Brandon X. This is part of a larger riddle room puzzle. Other rooms: Room 11 Once you enter the door labeled “3”, the door immediately shuts behind you. You are immediately in a room of ...
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1answer
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Puzzle Dungeon: Floor 2

After bravely circumventing floor one of Puzzlandia's dungeon and descending the staircase, you find yourself in room $2^4$, or $16$ (as the staircase said.) Items you have: rusty sword (+1 ...
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1answer
490 views

Morse code cryptogram

Ciphertext: 1010, 111, 11, 0110, 001, 1, 0, 010, 000 This cryptogram is based off of AE's first one. Enjoy. The answer to this is a clue to this question which is currently unanswered and has a ...
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578 views

Finding Uncle John!

It was a chilly winter night when I was hanging around with some friends. We were gossiping about the recent kidnapping cases where a few of the people from the town were missing. There was a news ...
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2answers
951 views

What was my friend doing?

I asked my friend what he did last week and he gave me this note. ivoesfe ivoesfe ivoesfe hppe nfo hppe nfo uif tjohjoh sbjo pof gmfxdvdlppt oftu qbbnfsjdbosjt nvujozcpvouz ...
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1answer
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Crack the code: JavaRelated

I got a card with a text from a software company, and it tells me to decode it. The only thing written on the card is the following code: ...
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0answers
225 views

Definitely not suspicious

This unsuspicious ... post - has just a bunch of random letters. No secret words, no silly ciphers, nothing. Nothing to see here. Goodbye. Urgent secret message: Go to another question ahem, what ...
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1answer
197 views

Complete the sentence

I forgot to bring my 110 69 119 67 101 108 76 112 72 111 78 101. Hint:
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597 views

Monoalphabetic Geometry

This is a second puzzle from the Monoalphabetic Equation series, you can check out the previous one here. A set of letters has been replaced by $a$, $b$, $c$, and $d$ and one symbol has been replaced ...
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713 views

Hidden in plain sight

My good friend Joseph Schmo, who I probably just made up, handed me this mysterious note. And right after I figured out what my other fictitious friend's note said! What is Joseph's favorite pastime? ...
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1answer
1k views

Moderators' communications leaked!

An online community has three moderators: Doorknob, Kevin, and Emrakul (in no particular order). In between making posts on meta, they decide to set up a code for their private communications, and ...
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788 views

School Authorities Conundrum

Our School authorities have decided to extend our syllabus. Boo!! They have sent us a letter in which they address this issue. They tell us that the new book which will be prescribed to us is hidden ...
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387 views

Bird is NOT the word!

I can't get into my computer. It's password protected, you see, and I got hit by a cement truck this morning in front of the Compound Word Store. Luckily, I have this nifty cheat sheet. It was ...
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3answers
886 views

A very short story, with letter swaps

Part of the community metapuzzle. I wrote a very short story. To make it harder to read, I made some letter swaps throughout. Omce apom o rine, b cbspemres nbdk n pkwmar marrks aod nicelk gaodpich ...
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1answer
328 views

My brother and his cipher

NOTICE: true story ahead, you can skip it if you want and go straight to the puzzle I was reading a book when a scrap of paper fell out. Looking at it, I realised that there was a code on it. Now ...
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2answers
736 views

The strength of ciphers against brute force methods - what makes it more difficult but keeps it fair for humans?

EDIT: We have a couple of cipher puzzles on this site which use primitive, simple ciphers like Caesar, Bacon and substitution ciphers, and some of these puzzles combine them. This made me wonder ...
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286 views

Not Just Black and White

Answer for this puzzle is one word. Have fun! Highlighted parts are where I realised I have clued it wrong... Sorry for all this inconvenience! Hint: usefulness level 1 usefulness level 2 This ...
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3answers
843 views

Your not so normal 'Who am I?'

This Who am I? Is a little more in depth, with a few puzzles to solve to get to the final answer. First let's start off with a short story riddle. From the story you should get two answers. One is 5 ...
7
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1answer
452 views

Where in the world am I supposed to go?

Not long ago I received an unsigned note that read: "meet me at the train station at noon on Friday" Followed by this riddle: The key to your curiosity. Lies in this riddle quite plainly. ...
7
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1answer
403 views

Oh boi! Dis aint Engliz! #1

First some Engliz: These weird combination of letters are actually words translated in some different languages, and concatenated. Each line has one word translated in different languages. These ...
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5answers
700 views

The princess' journey came to a crossroad

This is a sequel to A princess fell in love During her journey, the princess encountered a very strange crossroad. Can you help you her choose a safe way to go to the prince? What would she ...
6
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1answer
444 views

A letter telling my great-great-grandfather's death-day

Yesterday, while I was tidying my attic, I found a letter dedicated to my great-great-grandfather. (Note that the letter was inside a box which my great-great-grandfather transmitted to my great-...
6
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1answer
407 views

That is a battlefield

These emails keep coming, and I can't block them. Apparently my ISP has told me that they're too secure to end up on my block list, and for some reason, I can't send these messages to spam. Whoever ...
6
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1answer
334 views

Cryptograms in invisible ink

Solve the followng encrypted message. --2b1-21-1b112----b1b---21-b--12--1----b1b---b2-12-1--b22---2b21--211---b--121b-121-b21bb--b2-----211-1-b2b1---1b-12----2b21--211---2112b112-12-111-b2-----21b-...
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2answers
281 views

The shifted library

I'm keeping an alphabetically sorted (somehow) collection of books in my library. Unfortunately somebody shifted things around a bit and then deleted some stuff in all of the resulting pairs. Only the ...
6
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1answer
757 views

Can you help me find out what this guy's name is?

I'm a publisher. Yesterday I received an email from someone who wanted me to publish his book. However, he refused to send it to me unless I figured out his name. I sent back an email with the answer '...
5
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1answer
408 views

A “Puzzling” Cipher

I thought I'd put together a simple cipher for all of you Puzzling lovers out there. If you need help, you can always look to the wisdom of the past for guidance. The answer is a single word, and each ...
5
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1answer
349 views

There is a secret message in the picture #2

There is a secret message in the picture, can you find it? This solution is also a clue (how to solve) to the previous one - There is a secret message in the picture. This picture was neither used ...
5
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4answers
691 views

the reason i CAN'T WAIT for the holidays

tiS thE season of Rejoicing! TIme for Caroling, sUgAr cooKies, anD FaMily iNfiGHting! hoWever, there's an eXtra sPecial reasOn this wilL be the Best holidaY season eVer. there's Just one Question, now,...