How to encrypt/decrypt a string

[Mike_D]

There’s a pure-Xojo version of the RC4 algorithm here:

Speedy encryption and decryption

Michel’s version is old, you can use this function which works fine on iOS and is highly optimized for speed: Public Function RC4v6(dataString as string, keyString as String) As String // highly optimized version of the RC4 algorithm written for Xojo // uses pointers and MemoryBlocks for speed // written to follow the pseudo-code algorithm described here: http://en.wikipedia.org/wiki/Rc4 #Pragma DisableBackgroundTasks #Pragma DisableBoundsChecking #Pragma NilObjectChecking False …