(VBScript) ARC4 PRNG (Pseudo Random Number Generator)

Uses the ARC4 stream encryption algorithm as a pseudo random number generator.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Crypt2")
set crypt = CreateObject("Chilkat.Crypt2")

' Set the encryption algorithm to ARC4:	
crypt.CryptAlgorithm = "arc4"

' We want the encrypted output to be a hex-encoded string.
crypt.EncodingMode = "hex"

key = "000102030405060708090A0B0C0D0E0F"
data = "12345678"

' Key length is 128 bits in this example.
crypt.KeyLength = 128
crypt.SetEncodedKey key,"hex"

' Generate 16 "random" 8-byte blocks, encoded as hex strings.
' This example will generate the identical output each time
' it is run.

For i = 0 To 15
    cipherHex = crypt.EncryptStringENC(data)
    outFile.WriteLine(data)
    outFile.WriteLine(cipherHex)
    data = cipherHex
Next

outFile.Close