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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: sci.crypt
Subject: Re: HMAC cipher and a TRNG...
Date: Sun, 7 Jul 2024 22:34:06 -0700
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On 7/7/2024 8:10 PM, Rich wrote:
> Chris M. Thomasson <chris.m.thomasson.1@gmail.com> wrote:
>> A compromised secret password is bad.  I was just interested if I
>> could create different ciphertexts for the same plaintext and
>> password, as an experiment.  See?
> 
> Slightly revisionist history.
> 
> IIRC you were worried about having all bits of the plaintext change if
> any one bit of the ciphertext was changed by Eve.
> 
> Because if all you were worried about was different ciphertexts from
> same key and plaintext, that is already available from standard
> constructions.  Note this short example:
[...]

> Same key, same plaintext, two different ciphertexts.

Both. I wanted each encryption using the same key and plaintext to 
create radically different ciphertexts.

Also, I wanted it to be bit sensitive. If a single bit of ciphertext is 
altered it will decrypt to random junk.

My HMAC Cipher experiment does both.

I think those are interesting things.