XOR Encryption

In cryptography, XOR Encryption, also known as XOR Cipher, is a encryption algorithm. With this algorithm, a string of text can be encrypted by applying the bitwise XOR operator to every character using a given key. To decrypt the output, merely reapplying the XOR function with the key will remove the cipher.

• C#
• VB.Net
• C
• C++
• PHP

									Public Shared Function XORCipher(data As String, key As String) As String
	Dim dataLen As Integer = data.Length
	Dim keyLen As Integer = key.Length
	Dim output As Char() = New Char(dataLen - 1) {}

	For i As Integer = 0 To dataLen - 1
		output(i) = ChrW(Asc(data(i)) Xor Asc(key(i Mod keyLen)))
	Next

	Return New String(output)
End Function
								

Example

									Dim text As String = "The quick brown fox jumps over the lazy dog."
Dim key As String = "secret"
Dim cipherText As String = XORCipher(text, key)
Dim plainText As String = XORCipher(cipherText, key)
								

Output

									cipherText: "'\r\u0006R\u0014\u0001\u001a\u0006\bR\a\u0006\u001c\u0012\rR\u0003\u001b\vE\t\a\b\u0004\0E\f\u0004\0\u0006S\u0011\v\u0017E\u0018\u0012\u001f\u001aR\u0001\u001b\u0014K"
plainText: "The quick brown fox jumps over the lazy dog."