Online communication is a part of every designer/developer. With our friends, customers or colleagues, chats are usually the fastest and easiest way of communication.

Sometimes, the information we exchange online can be critical like passwords or "details of a project" and we want to make sure that it is private.

PrivyTalks is a free, simple and security-focused chat application that encrypts and decrypts the communication with RSA on the client-side.

Usage is pretty straightforward; once the room is created, the chat link is shared among two partners and the communication begins.

And, to make sure that there is no 3rd party sniffing the communication, fingerprints are created for each side, so they can exchange this information via another channel (like e-mail or SMS) and check if the connected user is the one that they are expecting.

That may sound paranoid but I'm sure every user had moments on worrying "what would happen if that info was leaked out" (and PrivyTalks is a simple + strong solution for the case).

The fast and real-time communication engine is built with Socket.io and the application works in all major browsers including mobile.

Cryptico.js is an easy-to-use JavaScript library for encrypting text on the client-side.

It has support for RSA + AES methods and the text can be encrypted with any given bit length (228, 1024, etc.).

The content is encrypted with a public key and it can only be decrypted with that key (which makes sense if the recipient already has that information).

Cryptico.js doesn't require any JS frameworks to function and it is well-documented.

Normally, when a data is submitted, it is sent in plain text if no SSL is used.

jCryption is a jQuery plugin for encrypting POST/GET data submitted by forms.

It uses public-key algorithm of RSA for the encryption & has a PHP file for handling the decryption of data.

Some features of jCryption:

• encryption up to 2048 bit
• AjaxSubmit supported
• doesn’t block the browser on calculations

The plugin is easy to install, use and extend. Calling the jCryption function:

$("#formID").jCryption();

and handling the data with the ready-to-use PHP function is enough.