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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4
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1answer
695 views

Here's another cryptogram! But don't look too far

Here is another cryptogram. Don't look too far. ndfd kx z ygn fh;glbfz Q And also, the 2 is a hint.
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1answer
433 views

Break this coded message: SJT LX NY …

SJT LX NY SIVOYFNPAU KZTN HWPQ ZGSKFYQZBZJV OQISAEGEXHO EP LNT TRHIIKK JH PFXYSG KJW HZ TKRP LASXHPTAZ UNMSMAWHCJ OHOGZ FR MOU DH IFCPTL DDIJWQFV PL CLPMQB WTSL WO DSQZ WC GLAVE GWYMQAUQUC JDWMASXQAHH ...
6
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2answers
272 views

Recipe for Success

One evening you receive an e-mail from an acquaintance, asking for your help. The e-mail runs as follows: Dear friend, I need your help! I've forgotten the combination to my safe and I need ...
2
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4answers
265 views

This and this - 5 cryptograms

Here are some cryptograms for you to solve: ...
43
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2answers
15k views

The mystery of NOC +10

NOC +10 On March 6th, 2015, a YouTube channel named "Noc +10" was created. Since that day, this channel is uploading some really darkly mysterious videos. I will start saying something about the name ...
5
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1answer
645 views

There's an ARG I've been working on, and I'm stuck on this puzzle

I've been attempting to solve this ARG named SAN for the past 2 days or so, and I've been stuck on this image for about a day. Are there any algorithms or methods to figure it out? By the way, the ...
19
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4answers
1k views

Six Series, Six Words

Update: I've just realized the image had a major flaw in it. I've added a new image and made sure it's correct. Nothing else has changed, only the image. Sorry for the inconvenience. I have six ...
7
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2answers
885 views

What is John's job?

You are a spy trying to find out the job of a man named John. One day, you go up to John's friend, Joe. You tell Joe that if he doesn't tell you what John's job is, you will destroy him. Not wanting ...
33
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2answers
4k views

Resistance is futile

On the sunny morning of April 5th, 2063, an alien spaceship started orbiting the Earth. Among the cries of "It's an alien spaceship!" and "Ohm my god!" from the people, governments noticed that they ...
2
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1answer
290 views

What was the encryption mapping?

In this Recent Question, what was the encryption mapping? In other words, how did each letter map to its 2-digit counterpart?
5
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1answer
150 views

Find the title and artist of this song

Below, I've used this alphabet: to encode the first eight lines of a song. Find the title and artist. 4c4a’3h4a 3b1d1f3g2a 2e1d 4c3a1b2e 3a2b2b 3g1b3d3e2e 1e3e4a’1e 3b1d1f3g2a 2e1d 3h1f3g 3a4b1d3f ...
3
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1answer
181 views

A picture of Gaspard Monge

In Paris, a famous Nobel prize winner was found murdered in his kitchen. The door of the refrigerator stood wide open, and a small piece of butter had fallen on the floor. On the kitchen table, there ...
10
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4answers
868 views

Happy Math Question

Solve the following morning math problems to solve the Math Message: $7 \times (60 + 103)$ $219 \times 2 \times 3$ $2 \times 3 \times 10^2$ $\sqrt{40000}$ $23 \times 5 $ $16^2 + 26$ $\frac{1000}{2} - ...
27
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8answers
2k views

Safe combination for your heritage

Phillip, a 68 years old man, was near the end of his life. Before passing away, he decided to hand to his daughter a piece of paper with the following: ...
5
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1answer
275 views

Scrambled Songs 2: What is the song this time?

Yeah... this is the sequel to Scrambled Songs which is here. This is to redeem myself from that really easy question: Another scrambled song... 3684-4009-4010-4840-3756-4876-4262-3755-4279 A hint ...
5
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1answer
427 views

The Art of Misdirection

You're part of a special intelligence operation trying to predict the location of the next strike for a notorious terrorist group. This group has proven that they are willing to kill innocent people ...
40
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3answers
4k views

What is the title of this modern art painting, if not “Stars and Stripes”?

This puzzle belongs to the puzzle series: hyper-modern art Still in the hyper-modern art gallery... "You know, even now that you have explained to me, how hyper-modern-art works, I still don't quite ...
45
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5answers
6k views

What does this modern art picture represent?

This puzzle belongs to the puzzle series: hyper-modern art Two visitors are standing in front of a painting in the hyper-modern art gallery, discussing it. "Well, I have to admit that I really don't ...
-3
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1answer
662 views

Solve this Encoded Text!

I wonder if you'll be able to reverse this set of words, but first you may want to get a bit shifty! iLppk scyc, wys ihmgltvihi xm! vKein xfs :H I have given you all the information you need to ...
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1answer
165 views

Caesar would be pleased

U PROP BY THERE, USE PARS PAR THERE PROP BY THERE IYBSM PAR YUCR THER, USE YH HS. THINE BP AUQQRS PAUP PAR HGBMBSUN PROP BY GRUTARE UP YHCR YPUMR?
9
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1answer
1k views

Justice and Fairness: Part 2

A friend of yours was part of a secret society and was put on trial on 15 December 2014 without a lawyer. Alice encrypted the trial's transcript and sent it to Bob, but double agent Carol was able to ...
12
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1answer
1k views

Heliocentricity

They approached the man apprehensively. He was aware of their approach, but did not turn to face them. Instead, he kept looking through the window toward the stars. Finally, one of the men gathered ...
15
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1answer
1k views

A Curious Recipe

Little Red Riding Hood received this odd recipe from her grandmother. Hello. Here's a cake recipe you might enjoy! Orange cake: (serves 4) Ingredients: - 111 cups caster sugar - ...
4
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4answers
355 views

Dr. Strangelove or How I Learned to Stop Worrying and Love the Bomb

Can you recover the following two dozens of (well-known) movie titles just from their initials? ...
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2answers
538 views

Cipher with a hidden key

The challenge is to decode this cipher: TJ KS JX AP GN DT DG FE ER EU UA HJ The key is attached to this question. Try to find it!
2
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1answer
479 views

Mission: Impossible 1

Ethan Hunt is alerted by the IMF. They want him to intercept a courier that is working for the super villains Matt Fillimore and Caro Bassanara. Ethan Hunt receives the following cipher from the IMF: ...
3
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1answer
232 views

Our Honor is Unstained

Here are four photos from Google satellite maps and one from Wikipedia (see note 1). These photos show a family related by strength and endurance. The goal of this puzzle is: to identify the ...
21
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1answer
497 views

The Dots of Creation

Along the road less traveled, an abandoned temple lays in ruins. Though it has suffered the wrath of time, its foundation remains strong. And within this place, an inscription remains visible. A ...
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1answer
330 views

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 ...
11
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3answers
3k views

Please help with this geocaching puzzle

Edit: added link for geocheck I have been working on trying to solve this puzzle for months and cannot come up with any solution. I have learned lots of puzzle solving methods in the process but I ...
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1answer
281 views

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 ...
5
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1answer
843 views

Who's the next target?

Kenny's a serial killer and he likes to play games. To make his killing spree more interesting, he leaves clues for the detectives on his next victim. One day, the police station received a message as ...
7
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1answer
790 views

Mousehunt cryptogram

I found this puzzle within the game Mousehunt It didn't seem to match any rune system that I know of. Rotating the image also didn't seem to show any useful information, although the first word when ...
5
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1answer
434 views

The Inspector and the Hit man

Inspector Crumblesniff thinks he is on the verge of arresting a notorious Mafia hit man, but he needs your help. First, after a raid on Sal's Pizzeria, he found an address book with these contents: ...
18
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2answers
1k views

One word: Bacon

Decrypt the hidden meaning in the picture below: Hint 1: Hint 2:
17
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7answers
2k views

Whisky treasure-hunt: Cryptogram which refers to a place in Scotland

UPDATE 4 - Inserted original list of questions (no more, no less) Could someone help me solve this code? I've tried for 35 years. 13 25 22 19 9 30 32 11 12 25 8 29 17 It is a place name in ...
0
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1answer
398 views

I need help on finding out what this means. I know there are 4 steps to it.

The driven ambitious with passionate zeal, Will step forward to discover the author’s reveal, With princes by men, In columns of ten, the experience the answer shall seal. QBOKD KWLSDSYX SC DRO ...
15
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2answers
1k views

The billionaire's necklace

One day, the old billionaire summons his relatives in his study: "I'm very sick and may die soon, but the thought of all of you waiting for my death just to inherit the money makes me even sicker. ...
3
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2answers
670 views

Where am I located?

Note: Not a true story I am currently bored while idly thinking about how I got this job in VA. Sitting at a desk, I think about my work conditions while playing around on Inkscape. Below is the ...
26
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1answer
3k views

Find the secret message

The word under secret means something. What does it mean? (Find the secret message.)
29
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3answers
2k views

The Baconian Tower

The picture below depicts Sir Richard Mervyn Bacon, a (very) distant relative of Francis Bacon, leaving his flat on a clear autumns night in order to get his favourite book from the local library. ...
6
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1answer
1k views

A riddle and a line of text

I have a bit of pseudocode for you, and then an encoded string. The pseudocode will help you untangle the string. It's not the most easily understood pseudocode, and that might (just might) make your ...
4
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1answer
1k views

A binary puzzle from 1950

I got this puzzle from my grandpa who was developing a cipher system; this is his first creation and his first example. He doesn't remember the plaintext, so I want to crack it, but I suck so I leave ...
3
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1answer
6k views

Texas Numeric Hidden Message [closed]

This numeric hidden message was found on a seat at Rangers Ballpark in Arlington, TX, with an instruction to "Solve the Riddle". What does it mean?
2
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1answer
523 views

Place names in movie titles - stumped on this puzzle

I'm working on this puzzle where the solution is either a word or phrase with no theme. The first part of the puzzle had incorrect movie titles with cities, states, etc, and the solution to the ...
25
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2answers
2k views

Known Algorithm Attack: Caesar Reloaded

Most of the puzzles here revolve around an unknown algorithm attack. That is, you are given an enciphered piece of text and asked to decode it (and often given a series of hints which describe how the ...
22
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1answer
2k views

Can you decipher the hidden message in this Christmas card image?

Sent by a friend in Germany. I have no idea what it says yet!...
11
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3answers
1k views

Christmas Day Cryptogram / Riddle

This is a cryptogram puzzle, with some riddle-style clues to help you solve it. When you find the thing that links all of the clues, that will let you deduce the keys to decipher the cryptogram. Here ...
12
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2answers
634 views

Descramble the scrambled text

I did something funny. I took a simple phrase. HELLO, WORLD! I generated all rotations of the string. ...