<p dir="ltr"><br>
Den 19 nov 2015 21:37 skrev "Jeff Burdges" <<a href="mailto:burdges@gnunet.org">burdges@gnunet.org</a>>:</p>
<p dir="ltr">> There is however another approach that appears to work :<br>
><br>
> Invent a one-sided large block cypher by block chaining regular block<br>
> cyphers of the size of one hop's information. We want the property<br>
> that alterations to cypertext create uncontrolled changes to all<br>
> plaintext before the alteration, or after if we reverse the orientation<br>
> of the Sphinx header. If an attacker modifies the header, then any<br>
> address containing or before the modified bit decrypts as scrabbled.</p>
<p dir="ltr">No need to reinvent all-or-nothing transforms, they're already here. </p>
<p dir="ltr"><a href="https://en.wikipedia.org/wiki/All-or-nothing_transform">https://en.wikipedia.org/wiki/All-or-nothing_transform</a></p>