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So I was reading about 1-bit error propagation for AES mode and how it propagates in various modes. I was wondering how error would propagate in ECB, CBC and CTR modes if it was a 2-bit or a 3-bit error on the ciphertext block when the receiver decrypts the ciphertext?

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    $\begingroup$ Can't a two bit error be treated as a pair of independent one-bit errors? Couldn't you work it out yourself based on that? $\endgroup$
    – poncho
    Feb 27, 2022 at 3:06
  • $\begingroup$ I think basically either a block is fully affected or a single bit is affected when it comes to single bit errors. I'll leave the realization what then happens with two-bit errors in the blocks affected by single bit errors. $\endgroup$
    – Maarten Bodewes ♦
    Feb 27, 2022 at 15:22

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