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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A fun series of riddles!

All of the clues will lead up to the key for a Vigenere Cypher: eutnn wo vvsf. Clue 1 (from www.riddles.com) I'm by nature solitary, scarred by spear and wounded by sword, weary of battle. I ...
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Trying to crack a code [closed]

I am trying this string set of puzzles. The last puzzle to do, began with 055 055 055 055 ...…040 056 055 055 055 055 which translated to: 77777(77777(877 …… 77(87777(87777 But I cannot work out ...
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Who am I? Try finding it out from the hints in the form of a 9 digit number

Hi friends. I am 252116211. You may think I am 252116211 or 252116211. But I am not. Also, I am not 252116211, 252116211, 252116211.... or some other 252116211. There is a lot that's not what I am. ...
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Cryptic question [closed]

I am stuck on this question which a friend gave me. Please help guys. The question is: The version tells it all drbocryvn uqlwzq cpluuh
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The Great Binary Puzzle - Part 1

You are in a dark room with 1 source of light (a lamp). You see a large door with a combination with nothing but letters. You find a sheet of paper stuck in the door with the numbers, "...
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Find the well-known Christmas song

14 25 15 9 3 7 2 6 4 7 2 9 1 1 14 25 15 9 3 7 2 6 4 7 2 9 1 1 2 15 26 19 1 4 16 1 7 4 9 1 7 14 8 5 25 15 4 5 13 3 5 13 14 25 15 9 3 7 2 6 4 7 2 9 1 1 14 25 15 9 3 7 2 6 4 7 2 9 1 1 2 15 26 19 1 4 16 1 ...
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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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A number that is a word

Below I have a string of numbers, these numbers form to become words and letters. It's your job to find out what the phrase is. 10-0-12-15-16-24-0-21-9-6-0-2-15-20-24-6-19 Good luck with ...
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What poison am I?

A very simple one: ----- .---- ----- .---- .---- ----- ----- .---- ----- .---- .---- ----- .---- .---- .---- .---- ----- .---- .---- .---- ----- .---- ----- .---- ----- ----- .---- ----- --...
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A simple substitution cipher

Decode the following ciphertext: Eqdhwtss'l Lgxh qffgxfetr zgrqn oz'l ofzkgrxeofu 'JVTKZN' lgxh ygk gxk dgkt egdhxztk soztkqzt eiosrktf. Vig qkt zitn aorrofu? Zitn'kt pxlz ktsqwtsofu zit ...
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find a word in this text [closed]

I have two "messages": 596f752061726520616c6d6f7374207468657265203b29 aHR0cDovLzE5My4xNDIuMTEyLjIyMDo5MC9tYWluX3Rhc2sucGRm They have a hidden password, and I don't know exactly which one could have ...
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What is the answer to the following puzzle? [closed]

Observe the following question carefully and answer accordingly. iVBORw0KGgoAAAANSUhEUgAAAA8AAAAPCAYAAAA71pVKAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsIAAA7CARUoSoAAAAAhSURBVDhPY3wro/...
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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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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'...
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Decode the message

Try to decode this message: y08 700) 07734 Hint: Hint
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Qz heona “cvpxyr evpx” - how can I solve this?

Here is the puzzle: Qz heona “cvpxyr evpx”. Please, can you help me solve it as I am struggling! Thank you!
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Find the number [closed]

Ocz vinrzm dn ji ocdn kvbz Find the numbers
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1answer
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What is the encryption algorithm used here? [closed]

Can you decipher what encryption algorithm has been used here. I have several examples but I cannot decipher the algorithm used. ...
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Another challenge for you guys

Ciphertext: ...
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308 views

I need help with this very hard riddle

I would appreciate anyone solving it because I have been wondering what the answer could be! Thank you in advance.
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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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code the following word using the sample code logic

Sample apple = btqreqemf mango = ntbreoehp banana = ctbreoebob code: orange = ?
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Room Puzzle, containing chess and ciphers. Can someone help? [duplicate]

I Have to force checkmate black king in two moves only its white turn. And the keypad Someone also asked this question here like a month ago, but the answer was wrong i tried alot of things but ...
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mmm mmmmmmmmm mmmmmmmmmmmmmmmm mmmmmmmm mmmmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmm

mmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmm mmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmm mmmmm mmmmmmmmmmmmmmmmmmmm mmmmmmmm mmmmmmmmm mmmmmmmmmmmmmmmmmmm mmm mmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmm ...
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This one's for you

Hello I will send you messages from time to time, they will get trickier and more difficult. I can't tell you my name. You will have to do the cipher. This one is quit easy and won't be that ...
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Vigenere, 2 different ways

You found 2 messages on a folded piece of paper. Osmz bdajamu se l qxufkw zvfciodrf zss, wq xv wrz kje zq jni nfla ut lrfdmm. Thkic bxswibi ep jniojei tzrhil kt snafq tp of gjhwp, pxa naoz qxp bu we ...
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Please help me Decrypt this

Encrypted Text: ewzdsaqet The only clue I've been given is there are no numeric values. I'm not all that good with this stuff, so could really do with a hand. ...
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Looks like ECB -- What story is this?

Secrets Revisited A friend sent me the following and wanted to find out if anyone could figure it out. The message was encrypted three times, and all keys and primers were provided. It appears that ...
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I've breached the ArcTec servers

Puzzle masters, I need your help. I've just breached ArcTec's secure servers and made off with a seemingly important file. However, it is encrypted and I can't break it. To my knowledge, it is ...
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248 views

What does this text say in full?

Here is the ciphertext: Fhrmt z dvyhrgv gl wzgz-nrmv gvcg rh zyhlofgvob zyhfiw. Blf xlfow szev fhvw zmbgsrmt vohv, yfg blf qfhg SZW gl fhv gsv hkvxrurx dvyhrgv dslhv dvynzhgvi zoivzwb szgvh fh! Mld ...
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How can I translate this hexadecimal code?

I've recently gotten into cryptography and found a code which I just have not been able to decrypt. Any help? All I know is its in hexadecimal notation due to the 0x notation. Here it is: ...
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247 views

Vigenère cipher [closed]

ABCDEFGHIJKLMNOPQRSTUVWXYZ = 0-25 List of keys starting in order you need to use them. Comic Bacon Key Cipher: QWUA BT UICL Video on how to use the Vigenère cipher Hint:
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Which emoji is 🍔 burger's match?

Known matches: Key Matched 🤣 🤝 🙃 🙂 ❤️ ❣️ 🐸 🐷 🐍 🐌 🤔 🤎 🚀 🙏 🍓 🍒 👆 👅 🐟 🐞 😥 😤 What is my match, if I am 🍔? Hint, since I don't believe in torture
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An strange bit of code

This is a basic cipher. Solve it and tell me what the message says. Iqsi dub mwtzkrr ixv ubjcao. Kzkf uxvj zv cyfzfr! Hints will come in time
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Security to the party[Part 39]

A party is being held at a local mansion. The host is very rich and his success is because of one thing — his famous recipe for Spaghetti! The only guests that may attend are people who correctly ...
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This is for an ARG can you solve this code for me? [closed]

aHR0cDovLzU0b2d1bTdnd3hodGdpeWEub25pb24vaW5zZXJ0b3Ivdmlldy8xMDVkYTI3YQ==
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Little challenge for y'all

Ciphertext: ...
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459 views

Decode this uncommon cipher

Can you decode this simple cipher? Full explanation required as usual. STPVR WTSEP KQ VRE ATVREP UA FYDE QDLXTFDEP If no one has cracked it in a couple of days, ...
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Identify this ciphered number

I have enciphered a particular number. Decode and identify this number: 200400100500300300100900500800100200500400300100200000600500300400400
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What is the next in the sequence? [closed]

Fill in the blanks for each sequence: 1) ottffssentettff _ _ _ _ _ 2) J A S O N _ _ _ 3) 1 11 21 1211 111221 312211 ?
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Code Uncrackable!

You can't crack it. There's a solution, definitely. It's pretty long. 0005200056 0005200057 0005200056 0005200057 0005200056 0005200057 0005200056 0005200056 0005200056 0005200057 0005200056 ...
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Why does everyone keep incessantly saying this? [closed]

Why does everyone keep incessantly saying this in all the chatrooms, ALL THE TIME?!?! If you see cay If you see cay then what, noone posts anything after it, are ...
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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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567 views

What does this say? (I want to see how easy/difficult this code is) [closed]

I made a code and I want to test out the difficulty, so can anyone figure out what this says? .1852132114 51415 775 14920 18582015 18582095 11149820 5255 .191852020512 2018158 18522518156 412158 5255
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Ifz, ipx bsf zpv epjoh Wbooz? What does this code from my mother's highschool stuff say?

I found this code in my mother's box of highschool stuff when we were cleaning the basement and found this just wondering what it says Ifz, ipx bsf zpv epjoh Wbooz? J bn epjoh xfmm, zpv? J bn epjoh ...

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