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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Find the hidden message!

I posed a similar challenge to someone and it appeared to be sufficiently hard that I'll post it here. Sooo... Find the hidden message! ...
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155 views

What am I cooking up today?

Today, I decided to cook something that, if it cooks correctly, should turn out pretty cool. Below are a series of riddles and ciphers that list the ingredients for what I am cooking. Can you figure ...
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A new kind of cipher?

So, I believe that I may have created a new kind of cipher, would you be able to solve it? (I'll let you know what I've decided to name it once you've solved it :) ) ...
9
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365 views

First Cryptography Puzzle

When adam and eve sinned, apple was the key. Lies of the Serpent, they both believed. Alternate: 56 108 87 97 119 53 97 43 57 49 68 105 66 51 121 115 84 54 120 51 81 65 61 61 I'm looking for just ...
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The Star Spangled Shifter and his coded messages

I got a strange email today. I tried running this through every decipher I knew of, but I couldn't figure this out. Can you help me figure out what this mysterious figure wants? from: ...
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The Trail of Clues: The Mystery island

<--- Previous and first clue You are standing on a roof in Israel at the top of the Ladder. You notice that there is a small package taped to the top rung of the ladder. You pick it up and take it ...
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Coloured dot cipher

I, as a curious being, stumbled upon a page which had a hidden dot cipher in it. Part of the console states: [...] we left you a little message in the dots of the footer (Source: segment.com) The ...
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226 views

The answer is Caesar. What is the question?

VNUGPEUISLOGTDTQPEGEXUCTSPGHEUDUK? ...
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A Kidnapped Friend

One friend of mine has been inactive over the past few weeks. One day, my friend sent me this: Hello there, I have been kidnapped! I secretly made this message in order to get you here. Here is ...
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687 views

What's the passcode?

One morning, as you wake up, you feel something on your face: It's a letter. As you take it off your face to read it, You fall off your bed. Uurrrgh, you say and stand up. The letter says: ...
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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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257 views

Encoded text message

I've revived the above texts from my friend simply called "me". Apparently the text messages tell you everything you need to know. Arrrrrrgh! I told him not to mess with people. Hint 1:
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Look inside to answer this [closed]

Qwb'kr kkuau; ekx kbwq . I'll say that what is important is not what you read. Hint 1: Hint 2: Hint 3: Answer to prove the hold reason wrong:
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Decrypting a Cesar Cipher puzzle from a hex

I have the following hex to ascii conversion: 70656c636762207a726e61662070656c636762207a726e = pelcgb zrnaf pelcgb zrn Applied with ROT13 I get: crypto means crypto mea I'm also provided with the ...
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Where did my Professor GO?

You wake up on Monday, realizing you're late to meet with your professor. You put on your hat and hurry down the stairs. Just as you're about to leave, your mom gives you an earful (unfortunately, you ...
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The cipher puzzle

One day, I found this crumpled up note. It said: ...
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88 views

Find the hidden dialogue

26535-34825-69399-78164-50288 59230-26433 70679-41971-14159-78164-06286-34211 Hint 1: Hint 2:
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367 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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My Spying Girlfriend

I need your help again. My girlfriend Ada now has a job at a spy agency and there's a... situation. Ada's boss called her into his office this morning. He was holding a weird tube with a button in ...
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1answer
71 views

Seeking Fortunes

Great uncle Joe passed away apparently without a will. However, one of his distant relatives got a note from him. He said that all of his relatives have to get a chance to decode it. Here is the note. ...
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Car Return Problem

Dave planned a party for his new company. Hundreds of people were invited and he knew that car parking would be a problem. To make it easier, the staff were to park the cars by brand and size. On ...
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1answer
186 views

Cannibal puzzle

You wake up in a dungeon. You see some small letters on the walls. They spell: You must get out of here. I have given you a simple puzzle. Here is a code: rw nxu mca ldpmhf "j uium um mhm b fctto". ...
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4answers
448 views

Where did this mysterious note come from?

The boy had a cat on the boat, Alone among blue all around. He wrote a very brief note, Hoping the can would be found. I just came back from the Latpipe Hotel and decided to head to the beach, for ...
6
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Wordplay Puzzle

So, as I was flipping through my papers from school, I realized I made an unscramble puzzle for my friends. I was interested if anyone could solve these words with a hard twist. Every scrambled word ...
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50th Puzzle Landmark: My exciting exploits with Adedayo, Prince of Nigeria

Today marks a very exciting day for me. Today will be my 50th puzzle on this site, and as such, I've created a challenge the likes of which I have never done before. I hope it to be my most ...
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Help my dear Friend!

My friend has been Kidnapped! You must find him at a location. The kiddnapper gave me a hint: iuay hyptqg pf du ukt sxdcd qi, qi Please help him!
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What's the secret text?

Poem: The sequence leads you there The "shift" is not that rare It is ancient, you will see Jupiter is the key 14 15 92 65 35 89 79 ?? OGSULLOIOGRREYSGXZ Hint Big Hint
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Base what? Oh, great, now I need magic

This cipher's too hard to solve by itself. This short riddle provides sufficient help. You must consult the fifth man; He'll lend a hand, And less information quite appropriate. <...
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Where is my 25 reputation?

You, Detective Ryan, are packing up, as you are retiring. You have to say goodbye to your best friend, Wudriwurds. You open his last letter that he gave you, and read it with all your heart. Dear ...
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2answers
163 views

logical deduction - A Cipher with Numbers

44339994666666455533 Can you solve this cipher? I know the repetition of numbers holds some significance, but can't really put a finger on how exactly. Any help will be appreciated.
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an enigma i can't solve, could you please help me solve it

Xnt vhkk rshk rghmhmf dudm vgdm hs fdsr czgj could you please help me crack this enigma, someone sent it to me a few days ago and i can't stop thinking about it
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Decoding ciphertext with base64 yields obscure unicode

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 ...
6
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1answer
402 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 ...
4
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1answer
427 views

A lad named E. Mandala

In a follow up from yesterday, I was sent another email from the same source. The tile of the message was, "A lad named E. Mandala" which I've set the title of this puzzle to. Can you help me make ...
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1answer
118 views

What is the code in the following sequence of numbers?

6-1, 9-3|4-1,6-3 2-1,5-3| 4-3.6-2|2-1,6-1,3-2,7-3,4-3,2-3,2-1| 6-1,3-2,2-1,6-2,8-1|6-1,9-3|3-1,6-3,6-3,6-1| The above sequence is a code which leads to a riddle. Please help me crack it.
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What I Learned from the Attic

Now that I have moved into my parent's house for a temporary stay, it was time for me to earn my keep. My father has become quite old, and time has not been kind. There is a lot of unused and ...
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Trying to de-code this and I'm having a lot of trouble

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 ...
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I need help with this

×] ∆}|£¢|€ √¶ ℅| £∆£•√ ¶¥ √°×¢ ^•£™×√π ¥£}}¢ ¥£]×}π. Hints: use keyboard (not every keyboard) the first word is I'm Samsung 7 A friend give me this riddle and I just couldn't figure ...
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I need help deciphering a message

My ex-boyfriend sent me a message with these letters and said that 'he's finally brave enough to tell me', or some bullcrap like that. He said he wouldn't tell me the encryption type, but he'd tell me ...
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430 views

The Taunting Hitman

I am a detective with the metropolitan police and I need your help. See we've been tracking a contract killer for a couple of months now and last week, we raided an old safe house after a tipoff he ...
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292 views

The Great Art Theft

The day was March 18, 1990. Just a few hours ago, multiple valuable artworks were stolen by men in fake uniforms. You, a famous code breaker, happened to stumble upon two pieces of evidences that the ...
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Why Do You Love Me? (Part II)

Thank you so much for your help in scoring my last date. The date went really well, and we have so much fun. However, after that date she didn't reply to my texts for days, only to hit me with this: ...
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291 views

I don't want to let my friends down

This is an entry into the Fortnightly Topic Challenge #36 I was supposed to do something, but I can't remember what it was. I know it was supposed to be fun or funny. In a typical effort to hide my ...
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564 views

Weird WhatsApp message

Today I found by internet an artist that does commissions. I wanted to get drawn a map for one of my role playing games. First I tried to call him (there's a lot personal info on the website I found ...
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someone sent me this cipher. what does it say? [closed]

someone sent me this cipher by email."gnkx bzud skoo xgzfg dzxh, tjg kg kx tkbbdf gnzy hlj uzh iyls. ky gnkx bzud hlj ezy nzrd gdzux. hlj skoo td fzekyb lgndfx. gnd ulfd hlj vkyc gnd ulfd hlj iyls."I ...
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740 views

What Encoding Algorithm is this? Encode table included

Take the word "puzzle" for example. What this algorithm will do is first break it into pairs: pu zz le Translated using the encoding table: ...
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389 views

Secretary: Parts 1-5

An entry in Fortnightly Topic Challenge #35: Restricted Title 1 My friend worked as a secretary, and she left out of nowhere! I found a few strange notes/messages scattered around her room. ...
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361 views

Password Strength

An entry to Fortnightly Topic Challenge #35: Restricted Title 1 - based on this xkcd. I am the password manager, helping others remember passwords. I am the password manager, receiving many calls ...
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1answer
298 views

Can anyone solve this?

My cousin sent me this today. I am totally confused with these characters.