ID: 315

Viewed: 3047

Added: Aug 19, 2002

Version:

Snippet uploaded by: snippet

Written By: Unknown

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Found on the Net somewhere.....

Simple cryptography

Note: I mean simple. These codes are easily cracked!

Simple cryptography

Note: I mean simple. These codes are easily cracked!

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<!---Declaration--->

`'Install a bit of security to your applications. This simple `

'encryption function can serve as both the encoder and

'decoder. In order for this to work properly, you must use

'the same numerical key each time.

'For example,

'

' lets say you have a string, SecretPassword, that is equal

' to 'the toolbox', and you wish to encrypt it.

'

' Call the following:

'

' SecretPassword = Encrypt(SecretPassword, 80)

'

'In this case you are using an encryption key of 80. So,

'the end result would give you a value of '$85p$??<2?(

'. in order to decode it, simply reverse the process, but be

'sure to use the right key!. in real world applications, you

'might want to create keys on the fly using a math algorithm

'and the len statement as a known base, such as:

Dim Key As Integer

Key = (Int(Sqr(Len(SecretPassword) * 95)) + 21)

'For the string SecretPassword = "the toolbox", a key of 53

'would be generated using the algorithm above.

'To get real sneaky, you can play around with this code all you

'want, but this is only a start!

'Here is the magic code to do the encryption. If you'll notice, it is the same encryption code used in the

'screen saver template.

Highlight All

<!---Code--->

Function Encrypt (Text As String, EncryptKey As Integer)

Dim Temp As String, RR As Integer

For RR = 1 To Len(Text)

Temp$ = Temp$ + Chr$(Asc(Mid(Text, RR, 1)) Xor EncryptKey)

Next RR

Encrypt = Temp

End Function'

;

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