XOR

XOR is a bitwise operation used by Geometry Dash to encrypt data. It is commonly denoted as a ^ in many programming languages

Geometry Dash has 2 methods to encrypting data using XOR:

• Using a singular key
• Cycling through a 5 digit key

When needed, Geometry Dash iterates through every byte of the data and applies the XOR operation using its key

Examples

Below are examples of the algorithms used

Singular

Pseudocode

result = "";
for (i = 0; i < input.length; i++) {
  byte = input[i].toByte();
  result += (byte ^ key).toChar();
}

Python

def xor(input: str, key: int):
    return "".join(
        chr(ord(char) ^ key)
        for char in input
    )

Cycle

Pseudocode

result = "";
for (i = 0; i < input.length; i++) {
  byte = input[i].toByte();
  xKey = key[i % key.length].toByte();
  result += (byte ^ xKey).toChar();
}

Python

def cyclic_xor(input: str, key: int):
    key_str = str(key)
    
    return "".join(
        chr(ord(char) ^ ord(key_str[i % len(key_str)]))
        for i, char in enumerate(input)
    )

Keys

Key	Usage	XOR Type
11	Player Save Data	Singular
14251	Player Messages	Cycled
19283	Vault Codes	Cycled
19847	Daily Challenges	Cycled
26364	Level Password	Cycled
29481	Comment Integrity	Cycled
37526	Account Password	Cycled
39673	Level Leaderboard Integrity	Cycled
41274	Level Integrity	Cycled
48291	Load Data	Cycled
52832	Multiplayer	Cycled
57709	Music/SFX Library Secret	Cycled
58281	Rating Integrity	Cycled
59182	Chest Rewards	Cycled
85271	Stat Submission Integrity	Cycled