Hi Steven,
> When sent the details about their keys, they included three keys. 
>
> Unfortunately, encrypt() and decrypt() each take only one key even when
> using Triple DES (DESEDE) as the algorithm.
I have no specific experience with this implementation of 3DES, but my
understanding is that the 3 keys are normally concatenated to produce
1 key.
Not sure if simply concatenating them will suffice in your case, but
hopefully that gives you a starting point.

Regards
Chris

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