B4X

ARC4 PRNG (Pseudo Random Number Generator)

See more Encryption Examples

Uses the ARC4 stream encryption algorithm as a pseudo random number generator. B4X

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

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

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

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

Dim key As String = "000102030405060708090A0B0C0D0E0F"
Dim data As String = "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.
Dim cipherHex As String
Dim i As Int
For i = 0 To 15
    cipherHex = crypt.EncryptStringENC(data)
    Log(data)
    Log(cipherHex)
    data = cipherHex
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