marcusds

Encrypts WordPress blog posts and pages so that even with access to the WordPress database your posts will still be private and secure. This plugin is in ALPHA! Be incredibly careful in your use of it. If you want to try this plugin out best to do so on a new install for now, works nicely then at least. For maximum security and the only way you will know 100% your data is safe in transmission is if you use HTTPS as well.

Encrypted Blog

The ultimate in WordPress privacy and security. Encrypts WordPress blog posts and pages so that even with access to the WordPress database your posts  …

palicao

This plugin adds a new permalink tag %hashed_id% which represents the encrypted 
version of your post ID. 
Uses hashids library (see http://www.hashids.org/php/).
With this plugin you can change your permalink structure into something like
<pre><code>/%hashed_id%/ 
</code></pre>
to obtain links like
<pre><code>http://www.example.com/B7j1rPk8
</code></pre>
or into something like
<pre><code>/%year%/%monthnum%/%hashed_id%/
</code></pre>
to obtain URLs like
<pre><code>http://www.example.com/2012/10/B7j1rPk8
</code></pre>
or
<pre><code>/%hashed_id%/%postname%/
</code></pre>
to obtain
<pre><code>http://www.example.com/B7j1rPk8/my-slug
</code></pre>
This plugin is useful when you want to obfuscate the number of posts or simply 
if you want an unusual and concise url schema. This is also useful if you want to have 
short URLs without using a third-party service.

WP Hashed IDs

This plugin adds a new permalink tag %hashed_id% which represents the encrypted

Encrypted Blog vs WP Hashed IDs