Completely Non-malleable Schemes

  title={Completely Non-malleable Schemes},
  author={Marc Fischlin},
An encryption scheme is non-malleable if the adversary cannot transform a ciphertext into one of a related message under the given public key. Although providing a very strong security property, some application scenarios like the recently proposed key-substitution attacks yet show the limitations of this notion. In such settings the adversary may have the power to transform the ciphertext and the given public key, possibly without knowing the corresponding secret key of her own public key. In… CONTINUE READING
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