"I forgot to mention that the triple DES version should be used, which basically consists of three repetitions of DES with three different keys"

Not quite right, it does use 3 different keys, but it performs:

DES Encrypt with Key 1

DES Decrypt with Key 2

and finally DES Encrypt with Key 3.
So it is a little trickier than reapeated DES :)

"Nothing is sure but death and taxes" I say combine the two and its death to all taxes!

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