owncloud/core — pull request #7807 by sarciszewski (2014-03-19 17:31:55+00:00)
Title: Update crypt.php

A 1024 kilobyte key would be obnoxiously slow to operate on. I'm assuming you meant 1024-bit?

Also, 183 bytes = 1464 bits.

Here's a safe alternative: 2048 bits, with comment-code sanity