The java version is using TripleDES encryption in CBC mode with PKCS5 padding. From what I've read and seen on the web, mcrypt with PHP does not support PKCS5 padding.

Here's a quick tutorial on how to setup Nginx with PHP support. The key? The installation of fastCGI, aka PHP-FPM, so Nginx can serve PHP files to clients.

Convergent encryption solves the problems cited with Bitcasa, but does present some risks. To understand those risks, it’s important to understand how convergent encryption is unique.