On Mon, Sep 24, 2012 at 2:38 AM, CodesInChaos <span dir="ltr"><<a href="mailto:codesinchaos@gmail.com" target="_blank">codesinchaos@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">The hash of the ciphertext depends on both the key and on how you</div>
encrypt. So it can't answer the question if two files are the same<br>
without downloading and rehashing at least one of them. Even when<br>
using convergent encryption, Tahoe uses a different convergence secret<br>
for each user, leading to different ciphertext hashes.</blockquote><div><br></div><div>In my system I'd like to avoid that. If anything I'd like to support an optional convergence secret per-file, which could be appended to the end of the capability</div>
<div> </div></div>-- <br>Tony Arcieri<br><br>