(11-09-2016, 11:38 PM)atom Wrote: It's still 112 bit then, I don't think so.
Yes is (key1+key2) (16 bytes * 8 bit) - 16 bit (lowest bytes) = 112 bits.
But
1. EncryptDes(data,key1,0)
2. DecryptDes(data,key2,0)
3. EncryptDes(data,key1, vector of encrypt) (it is not simple EncryptDes, it have leave vector of First Encrypt)