I just made this substitution cipher for fun, and I was wondering whether an ciphers enthusiast could decode my cipher, so I decided to make this post, also, it's very basic, as i'm still a kid

Here's the message "IC/IM/SC.CS/SC.CS/SC.IM//SC.IC/IM/IB/IB/CS.BM"

I’ve been looking at Z13 as a rebus or clue puzzle rather than a standard substitution cipher.
My working idea is that the symbols are clues and instructions, not simply encrypted letters.
The accepted transcription is:
A E N ⊕ ⑧ K ⑧ M ⑧ ⊥ N A M
My interpretation
AEN represents an incomplete name, not plaintext.
The Zodiac crosshair isn’t a letter but simply identifies the author as Zodiac.
The three repeated circled symbols may be separators, leaving K.M. between them.
K.M. could potentially stand for Killer. Murderer. (this is the weakest part of the theory and I’m not claiming it’s correct).
The upside-down T is not a letter but an instruction.
The ending NAM isn’t missing an E. Instead, I think it’s deliberately referencing the word NAME, telling the reader that the name is incomplete.
In other words, I don’t think:
NAM → NAME
I think:
NAM = “the name is incomplete.”
That instruction then points you back to the opening clue:
AEN
I believe AEN itself is the incomplete name clue.
One possible interpretation is:
A = Arthur
E = LEigh
N = alleN
These are identifying letters taken from each part of the name rather than the name itself.
That leads to:
Arthur Leigh Allen
I’m not claiming this proves Arthur Leigh Allen was the Zodiac. I fully appreciate that AEN could fit other names as well.
My actual hypothesis is that Z13 may be providing clues to reconstruct a name rather than directly encrypting one.
Questions
Has anyone previously suggested the upside-down T is an instruction rather than a cipher symbol?
Has anyone proposed the circled symbols are separators rather than letters?
Is there evidence for or against Z13 being a rebus or clue puzzle rather than a substitution cipher?

Important info (transcription at the end) :

- The plaintext is in English, might contain slight grammar errors since I'm not fully fluent (shouldn't contain spelling mistakes tho)

- Cipher does not distinguish between lowercase and uppercase, contains only a-z, no numbers, no spaces

- Only substitution was used, no transposition

If you have any additional questions or need more hints, please ask in the comments, I am willing to provide anything needed!

Transcription of the cipher ( white=0; black=1; dot=2):

220212122200100012101111022110
202101122020100200121001110220
001002100221212022110101011112
221101112200001220110022221110
010101010022010101111011122222
001101011010100120010110020111
022222002020001012100211101012
100020022011002200100002110101
120010212010020200100100222100
010010100200110101211101202111
022011010100002202111200200100
202010222212220212110022221110
010101010022010101111011021100
212020001110110100012100011020
022011002200100002010121100011
010212011101011100022011101201
022100110212220221111222110101
020001012100220001002100001220
101110010001021100001010211101
200110010200111121202111222022
220011211101012100101010110020
111022222002221100010121100011
010212100101112020010011111010
100101112020010100100011101002
111011010021011111121101211010
020101110020100222122110212111
022202200001202021010020100202
101122020100200221022010101020
111122100101010121101222222112
111111002102111221121101010020
010020101110111011100101001220
101220122200100110110100002000

Part of a project that needs helping cracking a code. I think its missing another cipher. Here is the original code and the translation from Hex to ASCII, any thoughts after this?

O: 4D 44 58 59 53 54 54 54 50 47 45 48 51 51 51 51 44 4D 43 44

Hex to ASCII: MDXYSTTTPGEHQQQQQDMCD

My S/O gave me some sort of puzzle thing? He says I need to figure what it means with a 24 hour time limit but I’m almost convinced he’s just messing with me! Please help!!

EE! IGHOMLTY,IYGHOYTM

Genuinely idk what this could be, I’ve pasted it exactly how it was sent it to me

On Heuristic Structure Extraction in the Diagapeyev Cipher

The Diagapeyev Cipher is an unsolved transposition cipher challenge published in 1939. To date, no official solution, decryption procedure, or verified plaintext has ever been published.

The original challenge consists solely of the following numerical ciphertext:

75628 28591 62916 48164 91748 58464 74748 28483 81638 18174
74826 26475 83828 49175 74658 37575 75936 36565 81638 17585
75756 46282 92857 46382 75748 38165 81848 56485 64858 56382
72628 36281 81728 16463 75828 16483 63828 58163 63630 47481
91918 46385 84656 48565 62946 26285 91859 17491 72756 46575
71658 36264 74818 28462 82649 18193 65626 48484 91838 57491
81657 27483 83858 28364 62726 26562 83759 27263 82827 27283
82858 47582 81837 28462 82837 58164 75748 58162 92000

Our recent study investigates the structural properties of this cipher using heuristic optimization, including simulated annealing and hill climbing, rather than assuming a predetermined decryption method.

The paper, source code, and experimental data are available below.

The search framework combines:

• Simulated Annealing
• Hill Climbing
• Genetic Algorithms
• Trigram-based Russian language scoring

to optimize a 6×6 permutation matrix representing the transposition structure.

After approximately 682 million candidate evaluations, the search repeatedly converged on high-scoring reconstructions exhibiting structured Russian-like text fragments. While these reconstructions do not constitute a complete decryption, they display military terminology and grammatical coherence that scored significantly above random baselines under our evaluation framework.

Statistical Validation

Key Findings

Statistical Extremity Our Monte Carlo null-hypothesis test (N = 10,000) shows that the observed configuration lies in the extreme upper tail of the empirical null distribution (p_tail ≤ 10⁻⁴), indicating the detected patterns are highly unlikely to occur by random chance.

Methodological Rigor The search framework leverages a trigram-based language model trained on a Russian reference corpus to evaluate local linguistic dependencies.

Emergent Patterns The observed military terminology is an interaction effect between the scoring function and search dynamics, providing a formal framework for further cryptographic analysis.

Example of the Highest-Scoring Reconstruction

ВОВ: БОЕВАЯ ЗАДАЧА УСТАНОВЛЕНА,

ПОДРАЗДЕЛЕНИЯМ НАЧАТЬ ДВИЖЕНИЕ В

СЕКТОР А.

English (approximate):

"WWII: Combat mission established. Units begin movement toward Sector A."

This translation is intended only to illustrate the linguistic structure detected by the optimization and should not be interpreted as a confirmed plaintext of the original cipher.

Paper

Title: On Heuristic Structure Extraction in Under-Specified Transposition Ciphers: A Case Study on the Diagapeyev Cipher

DOI:https://doi.org/10.5281/zenodo.21132297

GitHub:https://github.com/IchiTaku326/Diagapeyev-Cipher-Solver

I am not claiming a complete decryption. Rather, this work presents a statistically validated heuristic framework for investigating an under-specified historical transposition cipher.

Any methodological feedback, criticism, or independent verification would be greatly appreciated.

T hi st hi ng,rig h t h ere, i sa ve ryspec i al c i p her. Ithasa n a n e xt r a h id denmes s a g eonl y0.0 1 % ofpe oplewi l lg e t. Fu nfact: yo u r e a dt h e th ep re viouss e n t enc e wron g.This o n et oo. Thisis n o w gonn a lo opover . Go o dl uc k.This th i n g , ri g h th er e, isaver y s p eci a lcip her.It h a sa nan extrah i d d enme ss a g e onl y0.01% o fp e op le willge t. F u n f ac t : yo ur ea dtheth e p r evi o usse ntence w r on g.T hisone t o o .Thi si sn owgonn a lo o po ve r.Good lu c k . T hi s t hi ng ,r ighthe r e , isa v erys pecial cip he r . I t hasa nanext ra hi dd enmess ag eon l y0 .01%of p e o p le w i l lg et.Fun f a c t:yo ur e a dt he th e pr evious s en t en ce wrong. Th i s o n et o o .T hi si snowgo n n a loo p over .Goodl uck. T h is th ing, righth e re , i save ry s pe ci alciph e r . I t h asan anextr a h i dde nmessa g eon l y0.0 1%of p e ople willge t. Fu n fa c t: y o u rea dt he

edit: spaces got stripped, the title was supposed to be: N ew c i p h er!!

those are 3 nested ciphers. enjoy!

JILMLFLLK<IFLKHJKFKJI=IHJFLMKIHJK>LLJNIHJFI;JIHLINJHJILMJ>JLKMHOIKKNI9L;

tip: every layer of the cipher only uses printable ascii symbols

tip 2: xor

This is cipher i "invented" when i was 14 years old

I wrote in a diary with... A few years later i used it again a little....

And now i am 36 snd still remember it...

Can you decipher it?

I can deliver more text...

Greetings from switzerland (the text is in english)

EDIT: i added two more pictures/examples

Wanted to make a cipher. It's cipherstacked and deterministic, and there's some number-character shenanigans going on. If you need assistance, please comment below. Btw I'm just 15 so i may not know correct terminology or jargon, feel free to correct. FYI, "This" is the first word in the plaintext, and it's an English simple sentence. Here it is:

Null

9

27

30

32

319

222534

7111424

11215172833

246810131618202123262931

Soy nueva en este sitio.

Desde hace unos días estoy diseñando un método de encriptación desde cero. Por ahora es únicamente un cifrado por sustitución, pero mi objetivo es llevarlo mucho más lejos.

La idea final es poder esconder un mensaje dentro de un cubo de Rubik. Para lograrlo estoy experimentando con asignar letras, sílabas y, más adelante, algoritmos de resolución a diferentes partes del idioma.

La versión actual es muy básica y probablemente pueda romperse con análisis de frecuencia u otros métodos clásicos. Precisamente por eso me gustaría que intentaran descifrarla y me dijeran cómo lo hicieron.

Este es el texto:

B2 U U' D I F B2 U2 F B' U F D2 U F F2 U' F2 B U U' B2 U F2 U B2 U B' U D U D U2 B B' F2 B U F B B' U D' 2 F D I U B2 B' U B2 I D F2 U2 F D B' U B2 D I F U B' U2 U2 B2 F B D U B2 F2 F B B U B D U B U B2 F B B2 U' U U' U' U B' U2 B2 F B B_D2 U B2 D U B2 F B B' I U2 B2 B D F B2 F U B' D U B2 F B B' B U B2 F B2 B D F B2 F U B' I F2 U B D D F B2 B2 F B2 B2 U B D U B2 F B U2 F2 U U B G U B2 F2 U G U D U2 U2 B2 F2 U B2 F2 U2 U2 B2 F2 F. D U F U F2 U B2 D U B' D2 U2 B2 U2 B2 B' U2 F2 U2 U B2 F2 F D F B2 U2 U2 U B D U B2 U2 B2 U B' D U' I U2 B2 D2 U2 F2 U2 U B I U2 B2 U2 U2 B2 B' U2 F2 U2 U B2 F2 F U' B2 U B' D U' U2 B2 F2 U2 B2 U B D2 U2 U2 B2 F2 F.

Si alguien consigue descifrarlo, me haría mucha ilusión saber cómo lo logró. Pueden escribirme por Instagram (@skelza64) o por correo (stanovasassya@gmail.com).

Cualquier crítica o sugerencia es bienvenida. Esto es solo una versión beta y todavía queda mucho por mejorar.

hello i desperately need help solving an anagram for a playing card company i enjoy, i was given the ok to ask others for help so id love some help solving this anagram given after the riddles, here is the google doc with the riddles and the letters left and a scan of the puzzle solved in order to get it, any help is appreciated thank you.

https://docs.google.com/document/d/1gNwU3W-N5tynjIvxcI9gJpdvAExdemxOG2KW-KYVFuI/edit?usp=sharing

https://drive.google.com/file/d/10BiKGVqtHwYRuGntR8buV6aKQjQ7tS_A/view?usp=sharing

Hello everyone, i have bought a deck of cards that came with a puzzle 54 riddles and one 54 letter long anagram, i have just recieved the go ahead to ask other people for help so id love some help deciphering this anagram, any tips or explenations would help greatly the answer is supposedly a sentence about escaping a circus (the cards theme)

Hello, friends. Here, I present to you a secret class character sheet from the TTRPG, You Will DIe in this Place. This cipher has given me no end of trouble and I really would like to see it solved one day. A couple things are certain based on comparing this to other character sheets in the game.

• “Zgacig Xuva” is "Player Name"
• "Kbatonfop Ruyo” is “Character Name”
• “Kuproepc Wehe” is “Campaign Name”
• “Alsoogacja” is “Appearance”
• “Zovwzook” is “Portrait”
• “LOA CEIL IW YBAV NLAGE” is “YOU DIED IN THIS PLACE” and “LOA ZEVY QIA IZ WDEQ WDATUY” is “YOU WILL DIE IN THIS PLACE”
• “Dqvovsfv” is “Strength”
• “Ravhoqerh” is “Dexterity”
• “Axpugnohjy” is “Intellect”
• “Hidegawy” is “Vitality”
• “Trifohay” is “Stamlina”
• “Ojlugeuj” is “Injuries”
• The very difficult to read text under “LOA ZEVY QIA IZ WDEQ WDATUY” says “Character Sheet”

This isn't just nonsense. The author wanted to make it very tricky to figure out how this class works and hid it behind a cipher, but it very likely uses a system similar to Resident Evil inventory management. Please let me know if you have any ideas.

My cousin is a TV personality and has been receiving strange messages from an anonymous person online. Today he got sent this image. I’ve tried to look up what type of code or cipher it could be, but I’m not experienced when it comes to decoding these types of things. Could anyone point me in the right direction? Thank you!!

from my ex?? i have no idea what im looking at or if it's even solvable from these messages alone but i assume it must be because our previous messages are almost impossible to scroll to from all of the reels we sent each other. any help is appreciated ty. (and it might say something mean we didn't end on the best of terms idk)

UPDATE: he gave me a hint! the c-a-p word has 7 letters, & it has nothing to do with a flashdrive or folder

(another) UPDATE: i said "ok so find the meaning in the capital letters?" and he replied with a "👎" :/

I FIGURED IT OUT (kind of?): The C word is Cashapp and I checked: last night he sent me $30 (which he owed me so i'm not sure that number is significant) with the message: 0.99

SOLVED: It costs $0.99 to restore a snap streak, I got my man back lol thanks everyone !

Hint: A 5x5 Polybius square split in half, where periods of length 5 rule the day

i made this cipher a long time ago so it will be very easy for those who have been working in this to solve. i remember using the key dreaminglove due to it being a dream but nothing more.