http://simonwillison.net/2009-05-05T13:45:08+00:00Simon Willison2009-05-05T13:45:08+00:002009-05-05T13:45:08+00:00https://simonwillison.net/2009/May/5/hashring/#atom-tag

<p><strong><a href="http://pypi.python.org/pypi/hash_ring/1.2">hash_ring 1.2</a></strong></p> A Python library for consistent hashing with memcached, using MD5 and the same algorithm as libketama. Exposes an interface that is identical to regular memcache making this a drop-in replacement. <p>Tags: <a href="https://simonwillison.net/tags/amir-salihefendic">amir-salihefendic</a>, <a href="https://simonwillison.net/tags/caching">caching</a>, <a href="https://simonwillison.net/tags/consistenthashing">consistenthashing</a>, <a href="https://simonwillison.net/tags/django">django</a>, <a href="https://simonwillison.net/tags/hashring">hashring</a>, <a href="https://simonwillison.net/tags/libketama">libketama</a>, <a href="https://simonwillison.net/tags/md5">md5</a>, <a href="https://simonwillison.net/tags/memcached">memcached</a>, <a href="https://simonwillison.net/tags/python">python</a></p>

2008-12-30T15:27:33+00:002008-12-30T15:27:33+00:00https://simonwillison.net/2008/Dec/30/fake/#atom-tag

<p><strong><a href="http://www.freedom-to-tinker.com/blog/felten/researchers-show-how-forge-site-certificates">Researchers Show How to Forge Site Certificates</a></strong></p> Use an MD5 collision to create two certificates with the same hash, one for a domain you own and another for amazon.com. Get Equifax CA to sign your domain’s certificate using the outdated “MD5 with RSA” signing method. Copy that signature on to your home-made amazon.com certificate to create a fake certificate for Amazon that will be accepted by any browser. <p>Tags: <a href="https://simonwillison.net/tags/collisions">collisions</a>, <a href="https://simonwillison.net/tags/ed-felten">ed-felten</a>, <a href="https://simonwillison.net/tags/equifaxca">equifaxca</a>, <a href="https://simonwillison.net/tags/hashes">hashes</a>, <a href="https://simonwillison.net/tags/md5">md5</a>, <a href="https://simonwillison.net/tags/security">security</a>, <a href="https://simonwillison.net/tags/ssl">ssl</a></p>

2008-04-04T19:24:36+00:002008-04-04T19:24:36+00:00https://simonwillison.net/2008/Apr/4/hash/#atom-tag

<p><strong><a href="http://th.informatik.uni-mannheim.de/people/lucks/HashCollisions/">Hash Collisions (The Poisoned Message Attack)</a></strong></p> Demonstrates the MD5 weakness by providing two deliberately engineered PostScript documents with the same MD5 hash but radically different rendered output. <p>Tags: <a href="https://simonwillison.net/tags/collisions">collisions</a>, <a href="https://simonwillison.net/tags/hashing">hashing</a>, <a href="https://simonwillison.net/tags/md5">md5</a>, <a href="https://simonwillison.net/tags/postscript">postscript</a>, <a href="https://simonwillison.net/tags/security">security</a></p>

2007-10-23T22:39:15+00:002007-10-23T22:39:15+00:00https://simonwillison.net/2007/Oct/23/dopplr/#atom-tag

<p><strong><a href="http://blog.dopplr.com/index.php/2007/10/23/in-rainbows/">In rainbows</a></strong></p> Dopplr generates a unique colour for each city using an MD5 hash. The colours are then used in subtle but intelligent ways throughout the design—right down to the favicon. <p>Tags: <a href="https://simonwillison.net/tags/colour">colour</a>, <a href="https://simonwillison.net/tags/design">design</a>, <a href="https://simonwillison.net/tags/dopplr">dopplr</a>, <a href="https://simonwillison.net/tags/favicons">favicons</a>, <a href="https://simonwillison.net/tags/hashing">hashing</a>, <a href="https://simonwillison.net/tags/matt-biddulph">matt-biddulph</a>, <a href="https://simonwillison.net/tags/matt-jones">matt-jones</a>, <a href="https://simonwillison.net/tags/md5">md5</a></p>