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Results tagged with malleability
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user 84695
A cipher or mode of operation is said to be malleable if it is feasible to modify ciphertext to produce meaningful changes in the corresponding plaintext without knowing the encryption key.
1
vote
Making a cipher non-malleable using a plaintext transform?
under chosen plaintext attack
As using OAEP as an all-or-nothing transform would require processing in blocks (with padding) and potentially some extra tweaking to design it for the purposes of non-malleability … Finally, it is not necessarily be the case that using such a transform function would only provide the benefit of non-malleability. …
- 1,463
4
votes
2
answers
371
views
Making a cipher non-malleable using a plaintext transform?
The function does absolutely nothing except add non-malleability to the plaintext and thus ciphertext. It works before ANY cipher, and not with. … It is now quicker than ChaCha and achieves non-malleability at 512 bytes of input, without any bias (within limits of my testing). It adds a nonce on encoding that it removes on decoding. …
- 1,463