<div dir="ltr"><div class="gmail_extra">From the title it sounds like you're talking about my 2007 proposal:</div><div class="gmail_extra"><br></div><div class="gmail_extra"><a href="http://www.lshift.net/blog/2007/11/10/squaring-zookos-triangle">http://www.lshift.net/blog/2007/11/10/squaring-zookos-triangle</a><br>

</div><div class="gmail_extra"><a href="http://www.lshift.net/blog/2007/11/21/squaring-zookos-triangle-part-two">http://www.lshift.net/blog/2007/11/21/squaring-zookos-triangle-part-two</a><br></div><div class="gmail_extra">

<br></div><div class="gmail_extra">This uses key stretching to increase the work of generating a colliding identifier from 2^64 to 2^88 steps.</div></div>