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Cryptography

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  • $\begingroup$ I didn't try to create a block mode with extended error propagation. Plus I stated in an edit to my question that we are using two keys here, effectively doubling key size $\endgroup$ Commented Oct 12, 2016 at 12:43
  • $\begingroup$ "ECB can be shuffled in 16 byte blocks, which results in the cleartext to become shuffled the same way" ... describes error propagation. "Plus I stated in an edit to my question that we are using two keys here, effectively doubling key size" ... yeah, but without explaining why it doubles the key strength this is just a loose statement (two key triple DES also doesn't double the key strength...) $\endgroup$ Commented Oct 12, 2016 at 12:54