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Results tagged with cipher
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user 36023
A cipher is a simple method of modifying messages to make them unreadable except to readers who know the key. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other ciphers include polygraphic ciphers such as Playfair and Foursquare and numerical ciphers such as Polybius and Nihilist. Cipher puzzles sometimes make use of data encodings like Morse, Binary, or Base64.
9
votes
Accepted
Ciphertext Puzzle
The message (or at least, the first step, depending on whether the remaining unsolved noise is actually just noise) is
You get that by
Like so:
Got this far by using
- 77.9k
2
votes
Accepted
A new kind of cipher
This seems to be a mixture of l337sp34k and a substitution cipher, with several possible ciphertext substitutions for the plaintext letters. …
- 77.9k
11
votes
The Phoenix Cypher
The cipher is
UPDATE:
OP has informed us (in a comment to this answer) that the meaning of the key is
Given that this would be extremely dissatisfying for anyone trying to find said meaning, …
- 77.9k
5
votes
Accepted
Substitution cipher for your amusement - a programming challenge
Here are my tools. Both were whipped up on the spot, but having made both of these exact tools dozens of times in the past, never bothering to actually save them in a file, the Perl bits may have gott …
- 77.9k
0
votes
Simple ways to encrypt a message
After checking the other answers, looks like pigpen wasn't mentioned yet, it's quite popular on this site at least.
- 77.9k
2
votes
Accepted
Crypted Gobbledygook, Decrypted Obvious
So, it's a substitution cipher with a plaintext we all know, and there's a repeated three letter word.. I'll go with …
- 77.9k
10
votes
logical deduction - A Cipher with Numbers
It says
and the lack of white space and punctuation seems to indicate that the cipher was created …
- 77.9k
5
votes
Accepted
The cipher puzzle
Youtube URLs are case sensitive, this cipher is not.
Youtube URLs can contain numbers, this cipher can not represent them. …
- 77.9k
6
votes
Code with algebraic symbols
The number of groups, and the fact that there are two repeats, make it a plausible idea that this is a letter-by-letter substitution cipher of one kind or another. …
- 77.9k
2
votes
Code breaking: Find the solution
The message is
First, the tell-tale equals signs at the end suggest that
TTQKVUtXLUM6QQpCRVRBOlM6TAo3Okk6QwoyOlk6TAo1Okg6UQpHRSBYQiBTUSBGSSBLUCBaWSBOVCBXTCBSViBPQyBITQ==
is probably a well-formed …
- 77.9k
2
votes
Decrypt an encoded string, answer provided
Here's a partial answer that may be of some help to someone:
The length seems to be the same for the plain text and the encrypted text, so it's very likely a substitution cipher. …
- 77.9k
3
votes
What characteristics of a ciphertext can be indicators of a particular cipher?
If you have only capital letters in groups of five, you are probably dealing with a strong cipher, like Enigma, or another military cipher. … (In its day, the Vigenère cipher was considered strong enough to be virtually unbreakable, so hiding word and sentence lengths made a lot of sense then.) …
- 77.9k
2
votes
Accepted
Encoded Morse Code Interception
Doing the unnecessary busywork of decoding the morse code, we get
DIRECT SPECIAL ATTENTION CHARLES YOKOHAMA URGENTLY GOING ODDLY SLOW ISTANBUL TEN NASTY GAPS IN SATURDAY MEANS TIBETAN MEDICINE EASILY …
- 77.9k
6
votes
Accepted
Musical Chairs Cipher
First of all, let's assume that the encrypted words are in the same order as the plaintext ones, since otherwise this puzzle would just be some boring busywork.
Then, we notice that the kid's names s …
- 77.9k
3
votes
Accepted
141813 61618118, 161415 115... Decrypt my code
This is symptomatic of
So, the first idea would be to split the ’words’ into
So the first cipher to check would be
Going to check for that in the near future, but please do feel free to continue … Also, if my guesses are correct, the capital letter encodings overlap with the lower-case letters, which is not usually considered kosher in a cipher. I may of course have guessed wrong too. …
- 77.9k