by !Scott! (1 Submission)
Category: Encryption
Compatability: Visual Basic 3.0
Difficulty: Unknown Difficulty
Originally Published: Fri 14th March 2003
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
A high level encryption algorithm! the bigger the key ppl, the more secure your data will be!
API Declarations
'Text2 = Crypt(Text1, "secret_key_goes_here")
'To decrypt, do it exactly the same, but use the encrypted data as the Input string.
VBcoders
Dim Sbox(0 To 255) As Long
Dim Sbox2(0 To 255) As Long
Dim j As Long, i As Long, t As Double
Dim K As Long, temp As Long, Outp As String
For i = 0 To 255
Sbox(i) = i
Next i
j = 1
For i = 0 To 255
If j > Len(Key) Then j = 1
Sbox2(i) = Asc(Mid(Key, j, 1))
j = j + 1
Next i
j = 0
For i = 0 To 255
j = (j + Sbox(i) + Sbox2(i)) Mod 256
temp = Sbox(i)
Sbox(i) = Sbox(j)
Sbox(j) = temp
Next i
i = 0
j = 0
For X = 1 To Len(inp)
i = (i + 1) Mod 256
j = (j + Sbox(i)) Mod 256
temp = Sbox(i)
Sbox(i) = Sbox(j)
Sbox(j) = temp
t = (Sbox(i) + Sbox(j)) Mod 256
K = Sbox(t)
Outp = Outp + Chr(Asc(Mid(inp, X, 1)) Xor K)
Next X
Crypt = Outp
End Function
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