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68270RE: Encryption: Vim should use authenticated encryption mode

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  • MacDonald, Stuart
    Feb 15, 2013
      From: Ulrik
      > Sent: February-15-13 11:57 AM
      > On 2013-02-15 16:34, MacDonald, Stuart wrote:
      > > This isn't supposed to happen. A strong encryption algorithm will
      > > render completely different crypt text for even a single bit change in
      > > the plaintext, and, a single bit change in the crypt text is supposed
      > > to decrypt to corrupt plaintext.
      > I think this is your misconception. It can't strictly be true, because
      > the uncorrupted prefix of the file will always decrypt ok. To truly
      > render the *whole* decryption corrupt when the ciphertext is altered,
      > that would require a multi-pass encryption algorithm.

      I did say I'm a novice in this area. :-) The prefix argument is a good


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