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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Peterhead Codes and Ciphers Club: Weekly Challenge

This is one of the cipher-based challenges I have created for my club. This is a lengthy puzzle so feel free to post partial answers. My golden rule is that moving something that isn't glued down ...
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100 Years of GCHQ - A quick afternoon puzzle!

I'm off to the Science Museum London tomorrow, to the Exhibition celebrating 100 years of GCHQ. As such, they sent me a little reminder email this afternoon. On the bottom of the email was the ...
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Any help with this code (source text based game)

Source: Torn.com (text based rpg game) 31 30 35 20 31 32 31 20 31 30 31 20 36 38 20 37 30 20 37 31 20 35 34 20 31 31 39 20 31 31 34 20 37 34 20 37 35 20 36 35 20 31 32 32 20 31 30 36 20 35 33 20 31 ...
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The Hidden Treasures

My friend made this riddle and I think it’s pretty well made with lots of components, so here it is: ...
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What does this message in paper say? [on hold]

You wake up in an old horse wagon and get a piece of paper with strange symbols. What does it say? //Anyone can help me. Please!
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A trip to the library

I try to go to the library at least once every month, so I've developed a pretty good relationship with the librarian, a nice old man who sometimes teases me about my broad set of interests. Yesterday,...
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Any help with this code [on hold]

Any help with this code? It decrypts to plaintext word or words I'm stuck, so any help is appreciated. 31 30 35 20 31 32 31 20 31 30 31 20 36 38 20 37 30 20 37 31 20 35 34 20 31 31 39 20 31 31 34 ...
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What a beautiful canyon!

My friend sent me an image of this beautiful canyon and asked me to work out where he is. More specifically, his latitude and longitude. The only issue is that he's in Europe and this photo is of the ...
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I can't find out which cipher code is being used! [closed]

Been trying to find the right cipher, but haven't had any like. Was wondering if someone could please tell me what it says, or what cipher is being used. ...
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What's the correct password?

A detective was working undercover to try to bust a suspected gang of criminals. He got invited to a fancy club that needs a password to get in, but the gang leader said that everyone will be given ...
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519 views

Secret message 01

116313333134261542156511321455121126113213151461123615112516114142 OK, so recently I made up a way of sending coded messages and I was just wondering how difficult it would be for someone to crack. ...
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I wrote you a message

Take the dogs out for Millan, but only after you find the alphas. dog 1234 Ny nx dog 556 fqrtxy Fzlzxy 567 dog 5819 gzy 2 nx 345 dog 13445 fqwjfid 74859 mty. 55645788 dog 1234 ...
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The Grand Grid II

Have a look at the first Grand Grid to get an idea of the basic concept Each Grand Grid involves you discovering clues that allow you to solve a logic grid puzzle. The second in this series will be ...
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The Grand Grid I

This is the first in a series I am calling The Grand Grid. Each involves a logic grid puzzle that is solved by gathering clues presented in variously obscured forms. The description of the grid puzzle ...
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292 views

Word Search Cipher

I have come up with a cipher idea that probably isn't original but I can't find anywhere, and I wanted to get an idea of just how hard it is by seeing if anyone here can crack it. I would especially ...
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Rubio, please help Clark!

Clark who is consecutive in nature, lives in California near the 100th street. Today he decided to take his palindromic boat and visit France. He booked a room which has a number of thrice a prime. ...
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Luncheon in the dungeon

– "Sssslither..." Brigitte jumped. The voice had whispered almost directly into her ear, yet there was nobody to be seen. She looked at the ground beneath her feet. Was something moving? ...
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117 views

A cryptic list of words

You find yourself trapped in a dark room. You say, "hello" and bright lights turn on, flooding the area. You see a piece of paper on the ground: ...
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What's the answer to this?

I've been sent this yesterday with no info and I'm so confused. Can anyone tell me what the message is? Seh gdyla wdhjh, seh qhun alts bhn hqhunxyh plt axxbdyf gxu plt yhqhu gxryi lyi tx seh wrmmah ...
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A little bit of encryption

A little selfmade encryption riddle: Whenever I'm searching for a solution, I have this feeling, like standing on a single point. While I take a step forward, I have the feeling I'm falling two ...
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Underworld Royalties

1. Mr. Edison's Travel Diaries From Liverpool, James Edison traveled to Valencia. After watching the scheduled match, he then traveled to Italia and then Amsterdam where he promised to return in ...
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How to solve this coding decoding puzzle? [closed]

If in a certain code language CMWAX is coded as 51525525. Then what is the code for CIPKZ? Any help will be highly appreciated. Thank you very much.
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Find the PSE user name

Hidden in the ciphertext below is a user name from puzzling.stack.exchange. Who is it? The intended answer uses all of the ciphertext, not just a snippet that happens to match somebody in some way. <...
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A weird cipher inside video game

Recently a game named "Ode to a Moon" released.... during the gameplay there are several cipher sentences flashing on the screen. I was trying to decode them as a cryptography amateur(noob),but still ...
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A periodic message

I was wandering around Washington, D.C., recently, not paying attention to where I was, thinking about codes and ciphers, when suddenly it hit me. No, really: a blast of wind blew a paper right into ...
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Need help with an online puzzle / riddle

I found this online riddle at m4tr1x.ws, but now I am stuck. It seems you need to gain deeper and deeper access to this virtual Matrix-style computer system. First you need to create an account via ...
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The Coded Chessboard

"If you're worthy, the secret is found within you," the wise old lady had told you before you had entered the villain's lair. When the townspeople had told you to seek her out for advice, you thought ...
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Defuse… It's going to blast!

You are an intelligent decoder. The FBI now needs your help to defuse a bomb. You move near it and find the following notes. You have a glance at the notes. You are now ready to decode and defuse.. ...
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A journey to find me

The task is to find a word which is mostly used as a symbol in Math and Physics. It is also a giant in space. Find the appropriate links from the below hints. The links (imgur- pages) will further ...
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My sports program

This is my daily sports program: First exercise: 1) Stand up 2) Got on your knees 3) Keep both arms on your body 4) Pause 5) Lean your body slightly to the left Second exercise: ...
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Ooohh, it all makes sense now! :D

Introduction As requested by @Rubio, I am here to state that this is a metapuzzle based on other puzzles listed below. "Ooohh, it all makes sense now! :D" ~ Mr Pie The Puzzle Or does it? Answer is ...
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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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What causes these signs to follow this relation?

Can you find why does the below relation hold true? Hint 1 Hint 2
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142 views

White and black, white and black?

Can you find what comes in place of $???$ Hint:
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Decipher this three times, periodically

After hanging around this site for a little while I finally decided to put together a cipher for my first puzzle. I hope you guys enjoy it. ...
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Decode the message

Try to decode this message: y08 700) 07734 Hint: Hint
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6x7 Pokemon-based cipher

My friend made this cipher for me to solve and it has me stumped. Wondered if anyone else would want to take a crack at it. All it is is this image: Names of the pokemon in order are (assuming I ...
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Decode this for the right answer

ABABAAABAAAABAABAABAABABBAABAAAAAAABAAAAABAAAAABBAAABBBBAABAAAAAAABBAAAABBAABABAAABAA This an encrypted text. You need to decrypt it and encrypt it again to get the right answer.
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Riddle to Code 2: The return of numbers

The first is a pirates favorite letter. The second is from a famous quote of shakespear. The third is squaring it off in a famous formula. The fourth is the first in a very well known song. ...
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Oops!!! Dropped it again!

I have dropped my laptop twice in the past and luckily nothing went wrong. Today while getting ready for college, I dropped it again - for the third time. This time, something is wrong. When I ...
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color coded puzzle

Help me solve this problem. As this site appreciates a little effort from the person who posted it. Here's my thought process: 1) The matrix starts with 0 ( gr, gr, gr). It has three places which can ...
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Elementary, my dear …

My list for today Iodine-Sulfur+Americium-Scandium:Phosphorus Iodine-Titanium+Molybdenum+Thorium+Yttrium-Lithium:Helium Praseodymium+Oxygen+Vanadium+Erbium+Boron+Sulfur-Lithium:Aluminum ...
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Absent Employee's Password

You are the boss at an engineering firm. Recently a rather eccentric employee named Mr. Robemer made an abrupt exit when you accused him of devoting his worktime to his hobbies. Robemer stormed out ...
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Musical Chairs Cipher: Double Trouble

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
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Musical Chairs Cipher: Intermediate

This question is a continuation of the first question: Musical Chairs Cipher. The basic rules: Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in ...
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A Salute to Poetry

In honor of National Poetry Day (which happens to be March 21st - go figure), I have crafted a puzzle which I hope will do a small bit of justice to this day. Carefully hidden in the four sections ...
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Baby don't hurt me no more

You've been taken captive by a spy organization who seems convinced you're an agent for the other side. You've already spent a miserable day of questioning and torture and have no wish to spend ...
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Musical Chairs Cipher

Six children -- Alice, Ben, Carl, Denise, Eddie, and Flo -- are playing a game of musical chairs in class. On each of the five chairs is written a seven letter word. The children start out in ...
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132 views

Cricket or Cipher?

Congrats Bass for finding the answer of Find this Cricket terminology Find the names of three Cricket stadiums from the below codes: 1. dy30q7i 2. 23jgo36 3. 5y39fqo
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Where is Steve?

Steve is a modern painter. He and his brother live in England. Today his brother found him missing. He searched everywhere, but couldn't find Steve. But in Steve's room, he found the below painting. ...