Tool for encoding and decoding messages with the Scream Cipher (ÃA̧ȂÁAǍ), a substitution method where each letter is represented by an 'A' with distinct diacritics
Scream Cipher (ÃA̧ȂÁAǍ) - dCode
Tag(s) : Substitution Cipher
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Scream Cipher (ÃA̧ȂÁAǍ)
Scream Cipher Decoder
Scream Cipher Encoder
Answers to Questions (FAQ)
What is Scream Cipher? (Definition)
The Scream Cipher is a substitution cipher proposed by xkcd here in which each letter of the alphabet is replaced by an A with a unique diacritical mark. This method allows a message to be encoded using only variants of the letter A (thus similar to human screams, often represented verbatim by a succession of As: Aaaaaaaa!!).
How to encrypt using Scream cipher?
The principle of encryption is based on a fixed correspondence between each letter of the alphabet A-Z and a diacritical version of A. Each letter is replaced by its corresponding coded A according to the table:
| A | A | B | Ȧ | C | A̧ | D | A̱ | E | Á | F | A̮ | G | A̋ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H | A̰ | I | Ả | J | A̓ | K | Ạ | L | Ă | M | Ǎ | N | Â |
| O | Å | P | A̯ | Q | A̤ | R | Ȃ | S | Ã | T | Ā | U | Ä |
| V | À | W | Ȁ | X | A̽ | Y | A̦ | Z | Ⱥ |
Example: SCREAM translates to ÃA̧ȂÁAǍ
The letter A remains unchanged.
How to decrypt Scream cipher?
For decryption, the reverse process of encryption is applied by associating each diacritical A with its original letter in the A-Z alphabet.
Example: A̱A̧ÅA̱Á translates to DCODE
How to recognize a Scream ciphertext? (Identification)
A text encrypted with the Scream cipher contains only A characters adorned with various diacritical marks (umlauts, accents, cedillas, etc.).
Any observation of a sequence of A letters, whether or not they have unusual marks, is a good indicator.
Any reference to horror films (including Scream) or the web comic series XKCD is a clue.
Source code
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Scream Cipher (ÃA̧ȂÁAǍ) on dCode.fr [online website], retrieved on 2025-04-03,
