Scream cipher (sethmlarson.dev)

ẰǍȦǠẠ ÄẪǠẠ

... in the same sense that ROT13 or base64 would be a cipher.

Ảặậậ ạẵaạǡ ȧặaậậā ǎẩạặȧặǡạǎẩẳ, a áǎạ ầẫȧặ ằȁẩ ạẫ ȁǡặ ạẵaẩ ȦẪẠ13

Now pack even more info in each character with Zalgo text.

There are a little over 256 unicode Combining Marks that have a 2-byte UTF-8 encoding. I picked a set of them, defining an encoding I call zalgo256:

https://gist.github.com/DavidBuchanan314/07da147445a90f7a049...

Since an arbitrarily tall stack of combining characters still counts as one grapheme cluster, if some application limits string length by counting grapheme clusters then you can stuff an unlimited amount of data in there, with "only" 2x overhead in the byte representation.

Unfortunately HN filters some of the codepoints so I can't demonstrate here. Since I chose "A" as the base character which the diacritics are stacked on, it has a similar aesthetic to the SCREAM cipher although a little more zalgo-y.

One could use emojis instead, then the message could be hidden in plain sight in places where emoji-spam is common.

[dead]

[dead]

I did something similar a while back but using all the invisible characters to encode extra data into telegram messages for metadata storage

https://github.com/sixhobbits/unisteg

it had to be done https://chatgpt.com/g/g-68ce9419c7d4819190f82744d6e2741e-url...

Ǎầầặắǎaạặậā ạẵẫȁẳẵạ ẫằ ȂẤĂẮ, ǎẩằaăạ a ǟȁǎăấ ǡặaȧăẵ ằẫȧ ạẵǎǡ ạǎạậặ ẳǎàặǡ ầặ ȂẤĂẮ, ǎạ ăẫȁậắ áặ ăẫǎẩăǎắặẩạaậ, áȁạ Ǎ ảẫȁậắ ầặẩạǎẫẩ ǎạ ǎẩ ạẵặ äaẳặ ǎằ Ǎ ảặȧặ āẫȁ.

Here's another implementation I made a few months ago:

https://ethmarks.github.io/posts/screamcipher

I have been using ROT13, but I’ve been looking for a post-quantum replacement so definitely I’m going to convert to SCREAM. It’s generally understood that qubits are unable to represent or even discern the little squiggly bits above normal Latin letters.

Thank you for this important contribution to cryptography!

It's hilarious that Stream Ciphers are the closest thing to the One-Time-Pad (which provides "Perfect Secrecy") and this thing is a Monoalphabetic Substitution Cipher which provides no security whatsoever.

Now I need a TTS to read a scream.

[dead]

Most of these are short/long vowel markings, except last one which is (probably) implosion. And rest are frontal/back and wide/narrow A.

But Swedish "Å" is just stupidity "O", because they started pronouncing "O" as "U" and "U" as "Y".

-- Can you pronounce these screams?

Ạẵặǡặ Äȧặạąặậǡ Aȧặ Ầaấǎẩẳ Ầặ Ạẵǎȧǡạā!

It's not necessary to write the ciphering logic.

  CIPHER, UNCIPHER = str.maketrans(CIPHER), str.maketrans(UNCIPHER)

  print(s := 'STREAM CIPHER'.translate(CIPHER))
  print(s.translate(UNCIPHER))

Finally we can talk to the bomb dudes in Serious Sam

Do this with variants of O and the ghosts will be happy.