# 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 Common Pattern In These Words

You are a super spy, typing on your QWERTY keyboard, when suddenly you received an urgent call from your boss, Caesar. He had urgently called you, defying all protocols, as he wanted to inform you ...
767 views

### Cipher text on an ancient wall

The following text was found written on the wall of an ancient tomb: $\text{DXFDMKEPU}$ Can you decipher what it means? Nearby the wall, this piece of parchment was found. Perhaps it is a clue ...
1k views

### Reverse minesweeper?

The puzzle below, when filled out completely, is a valid minesweeper board. Some of the mines and numbers have already been filled in. Can you fill in what is missing and use the solved grid to find ...
511 views

### Fun with Flags part 7: attention please

We are looking for an idiom. Hint 1: Hint 2: Other (independently solvable) puzzles of this type: 1, 2, 3, 4, 5, 6, 8, 9, 10.
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### - oo_ - a! - o _ o _ _ o _ a _ _ _! [closed]

While I understand that many words will fit the following, the final version should and will make sense once you get the right words. The text includes many familiar names. Thanks for the patience.
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### A remarkable musical ode

On his deathbed, the great blind composer Charles Triangle composed the following remarkable piece, but his penchant for puzzles has left critics in tears searching for a deeper meaning to a piece ...
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### Not to waste a perfectly good puzzle

I formulated this puzzle as part of a project I'm working on. However, it turned out that it was, uh, a bit too difficult to include for the audience we're aiming it at - it took someone over 40 ...
168 views

### Exceptional numbers, neither good nor bad

Behold, my new comrades, a monstrous yet straightforward puzzle, appearing on the order of that group of fellows occasionally visiting PSE but hitherto unable to join their simple friends. I assure ...
502 views

### Signatures of serial killer Edward Wayne Edwards?

This is from a real-life murder-mystery. In 2009 Edward Wayne Edwards was arrested and convicted of five murders, following a tip-off from his daughter April. Former detective John A. Cameron ...
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### We Have the Power

I was out supporting my local labor struggle when I got this request: 9F06 7F11 7F23 7F05 7F17 8F19 7G11 8F18 7G08 7G01 7F09 9F22 2F33 9F15 2F07 2F10 7F02 So, what should I do?
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### Messages in Space and Time

Throughout my long life, there are a few messages I have heard which have made an impact on my life. Someone recently sent them to me, though I am far from home. However, they coded them first, so it ...
298 views

### How to solve morse code without spaces?

My friend got a note that has this morse code: .--......-.----....- She asked for help solving it. It doesn't have any spaces, therefore we don't know what it ...
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### I am kind of stuck with this cipher

Someone recently sent me this cipher: (https://pastebin.com/uEg9dTpi), at first it's something that seems like decimal code and then there's an encrypted code that has a lot of letter repetitions, ...
243 views

### Is Cricket Code?

Note: No cricket knowledge is needed to solve this You need to quickly pop into your local cricket club to grab some kit, but upon arrival you discover the clubhouse is locked. There is a number pad ...
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### Again, the scientific one!

I am looking for an answer that consists of two parts(____ ____). The task is to somehow make sense of this word grid below with the help of the clue. Hint Hint2
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### Can you find the cipher that I used?

I have encoded a phrase, using a cipher that I invented. But I don't want you to decode it, rather I want you to figure out how my cipher works. This is the phrase that I encrypted Find the ...
177 views

### Here is the Answer, Now Solve!

Using a certain rule, I can express "THIS PHRASE IS VALID" as "KZZK GZISKV ZK PSDZV". What is this rule, and how did I come to it? Hint/Note: Non-native English speakers may have a more difficult ...
305 views

### Zed's Garden: Nothing But Flowers

My friend Etta and I constantly pay visits to each other. Etta runs a little flower shop down the street from my house, so naturally I try to stop on by while I gad about town, and sometimes I'll even ...
103 views

### Used technique to solve web interface permutation used in linked answer

I would love to get to know how the user 'phenomist' came to his solution (Link) from a technical point of view. Of course I did tried it on my own. I used an interceptor to catch the HTTP request ...
128 views

### Help me! I'm trapped

Can zpv tgcf wklvC Mw ymjwj gt4utk v10 1pm 2qn0nI
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### You receive a mysterious tape

You receive a mysterious package from someone with a tape inside it. You run the tape into your computer, but it says it's corrupted. You then take the raw bits, and they come out like this: ...
564 views

### The escape of Beastly Gerbil

The finale of a three part series: Part 1 - The disappearance of Beastly Gerbil Part 2 - The entrapment of Beastly Gerbil I have a lot to think about... firstly I disappeared for two years, and now ...
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### Number Code - A Visitor by Moonlight

You hear a knock on the door downstairs while you're sleeping. You creep down the stairs by the light of your phone, only to see a shadow exiting through the window. By the moonlight, you see a piece ...
280 views

### The scientific one!

The picture below will lead you to the correct answer. The answer consists of two parts(_____ _____). Try see if you can make sense of it! Oh, and don't forget.... the scientific one! Hint
492 views

### Something I loved the most

Below are some puzzles you need to solve to make a 4 letter word. 1. 105 35 315 ? 2. I am the most important element in your surrounding. I was found by a Scottish physician. Who am I? 3. I am ...
179 views

### Found this on The Ohio State University campus on a pillar relatively hidden from view. Any leads? I’m clueless

Here is the photo of the code... I think. I don’t know what it could be, but it was duct taped to a pillar for several weeks before I was kicked off campus from COVID-19:
264 views

### Who wrote this potion recipe? (#2)

Below is a recipe for a Nosebleed Antidote written by a mysterious wizard. Just like other wizards before him have done, the one who wrote this recipe has hidden his name within the recipe. Can you ...
228 views

### Who wrote this potion recipe?

Below is a recipe for a Fainting Draught written by a famous wizard. The potionmaster who created this recipe has hidden his name within the recipe. Can you find the name of this potion's author?
310 views

### A descriptive cake

A 'geezer' walks into a bakery. The man is covered from top to bottom with tattoos - on his face, on his shoulders... even arrow tattoos on his fingers. He has dropped by to hand in a design for a ...
1k views

### Find the hidden word (Harry Potter theme)

Bouncing bulbs are jumping all around the greenhouse. Can you help sort them out and figure out the hidden word? (Note: the answer is something from Harry Potter)
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### The witch's hex visual riddle

Ever since that evil witch put a hex on me, my head's been spinning in circles and I constantly feel like I'm about to fall down backwards. As she fled the scene, she left behind this note. It seems ...
484 views

### Insufficient facts

Some wear gold; some wear blue; Some wear red while watchest you. Some are brown; some are yellow. All aboard would save their fellow. Flights of fancy, flights of risk, Flights beyond our orb'ting ...
144 views

### At most halfway!

Try to interpret this image below. Why these numbers? Give a full explanation as to why. Let's play b!
2k views

### This cipher needs a name!

This puzzle is a spin-off from the 'This new puzzle type needs a name' series. I have devised a new cipher and used it to encode its own name. I need you to tell me: What is its name? This puzzle ...
166 views

### ...vs VTE(next to)

What do these letters and numbers below represent? After you've figured that out, replace the three question marks! LXE 329, CIE 266, PNS 260, KPE 141, HCQ 132, LZE 122, FVS 111, DIG 101, VTE 100, ...
475 views

### A possible 5-bit binary code

This image and puzzle comes from Level 18 of a game called Boxentriq. I have solved the preliminary mastermind puzzles on this level to reveal the sequence of pawns and bishops shown here, which, ...
275 views

### Find the secret word hidden in this message

(TL;DR at the bottom) The following message was received from a friend: I need you right away to help me use 0x1DD1A to find out how to set up my ...
146 views

### Cipher puzzle - Cryptography of the day

I received this in my email: Kpa nfwa jnjnbb vo Sk kizk auy phurtpijd? Solve it.
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### The cook was fired!

What word am I looking for? The cook is fired! Decay! The baker's dozen! I need a new job. Hint #1: Hint #2:
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### First primary and then secondary

When I was in art school I found an old transcript of a young girl. She used a colour scheme to write down her age and her birthday. But she encrypted it somehow…. Below the (modernised version) of ...
377 views

### Encrypted growing sequence

The following sequence has been encrypted: 1-0 3-0 6-1 ...
668 views

### Shots, shots, shots, shots!

Once in a while I go out for a drink to my favourite bar. Normally is just drink a beer, eat some snacks and have a good time with my three friends. But last night I wanted to do some shots. The ...
286 views

### Picture-Puzzle. Find the number!

Make sense out of this picture below and find the two-digit number! Note: Pay attention to everything except the rounded rectangles
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### Usually by algorithm's, but not in this case

The task is to decipher the picture below and then replace the question marks!
281 views

### One hundred and one translations

Miss Florida, Silver tuxedo, Cadillac moon, Room 101. What may a doctor provide?
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### Given these numbers, find the hidden word

Given this sorted list of 33 numbers, is it in your power to find the riddle they are hiding and figure out the secret word? ...
814 views

### Challenge on ASCII Codes

My friend shared a challenge puzzle with me but I don't have any idea how to solve it. I believe that it's related to ASCII characters.
226 views

### Zed's Order: Breakfast at Elon's

My friend Elon and I constantly irritate each other. He recently built himself a rather respectable restaurant – a sort of bed-&-breakfast, minus the beds. Last week, he asked if I could ...