Editing XOR cipher (section)

==Example implementation==
Example using the [[Python (programming language)|Python]] programming language.{{efn|name=inspired}}
<syntaxhighlight lang="python">
from os import urandom


def generate_key(length: int) -> bytes:
    """Generate encryption key."""
    return urandom(length)


def xor_strings(s, t) -> bytes:
    """Concatenate xor two strings together."""
    if isinstance(s, str):
        # Text strings contain single characters
        return "".join(chr(ord(a) ^ b) for a, b in zip(s, t)).encode("utf8")
    else:
        # Bytes objects contain integer values in the range 0-255
        return bytes([a ^ b for a, b in zip(s, t)])


message = "This is a secret message"
print("Message:", message)

key = generate_key(len(message))
print("Key:", key)

cipherText = xor_strings(message.encode("utf8"), key)
print("cipherText:", cipherText)
print("decrypted:", xor_strings(cipherText, key).decode("utf8"))

# Verify
if xor_strings(cipherText, key).decode("utf8") == message:
    print("Unit test passed")
else:
    print("Unit test failed")
</syntaxhighlight>

A shorter example using the [[R (programming language)|R]] programming language, based on a [https://www.instagram.com/p/CfcTwYYlnC9/ puzzle] posted on Instagram by [[GCHQ]].
<syntaxhighlight lang="R">
secret_key <- c(0xc6, 0xb5, 0xca, 0x01) |> as.raw()

secret_message <- "I <3 Wikipedia" |>
  charToRaw() |>
  xor(secret_key) |>
  base64enc::base64encode()


secret_message_bytes <- secret_message |>
                        base64enc::base64decode()
xor(secret_message_bytes, secret_key) |> rawToChar()
</syntaxhighlight>