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I just put together a tiny python (python 3) example that calculates the KCV that PC Crypto is issuing (first 4 bytes of the encryption of binary 0's with the key portion). I can confirm that the execution worked. import binascii import hashlib import base64 from pyDes import * data = '000000000000000000000000000000' key = 'E6F1081FEA4C402CC192B65DE367EC3E'...

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