Have a try here: <a href="http://0bin.net">0bin.net</a>

0bin is a client side encrypted pastebin that can run without a database.

It allows anybody to host a pastebin while welcoming any type of content to be pasted in it. The idea is that one can (probably...) not be legally entitled to <a href="http://www.zdnet.com/blog/security/pastebin-to-hunt-for-hacker-pastes-anonymous-cries-censorship/11336">moderate the pastebin content</a> as he/she has no way to decrypt it.

It's an Python implementation of the <a href="https://github.com/sebsauvage/ZeroBin/">zerobin project</a>. It's easy to install even if you know nothing about Python.

When creating the paste:

• the browser generate a random key;
• the pasted content is encrypted with this key using AES256;
• the encrypted pasted content is sent to the server;
• the browser receives the paste URL and add the key in the URL hash (#).

When reading the paste:

• the browser makes the GET request to the paste URL;
• because the key is in the hash, the key is not part of the request;
• browser gets the encrypted content et decrypt it using the key;
• the pasted decrypted content is displayed and code is colored.

Key points:

• because the key is in the hash, the key is never sent to the server;
• therefor it won't appear in the server logs;
• all operations, including code coloration, must happens on the client;
• the server is no more than a fancy recipient for the encrypted data.

• <a href="https://en.wikipedia.org/wiki/Python_(programming_language)">Python</a>
• <a href="http://bottlepy.org/">The Bottle Python Web microframework</a>
• <a href="http://crypto.stanford.edu/sjcl/">SJCL</a> (js crypto tools)
• <a href="http://jquery.com/">jQuery</a>
• <a href="http://twitter.github.com/bootstrap/">Bootstrap</a>, the twitter css framework
• <a href="https://github.com/sametmax/VizHash.js">VizHash.js</a> to create visual hashes from pastes
• Cherrypy (server only)

• 0bin uses several HTML5/CSS3 features that are not widely supported. In that case we handle the degradation as gracefully as we can.
• The "copy to clipboard" feature is buggy under linux. It's flash, so we won't fix it. Better wait for the HTML5 clipboard API to be implemented in major browsers.
• The pasted content size limit check is not accurate. It's just a safety net, so we thinks it's ok.
• Some url shorteners and other services storing URLs break the encryption key. We will sanitize the URL as much as we can, but there is a limit to what we can do.

• Request throttling. It would be inefficient to do it at the app level, and web servers have robust implementations.
• Hash collision prevention: the ratio "probability it happens/consequence seriousness" <a href="http://stackoverflow.com/questions/201705/how-many-random-elements-before-md5-produces-collisions">is not worth it</a>
• Comments: for now. It's on the todo list.