What it is

SecreTwit is a simple Twitter client with a unique feature – hiding secrets in tweets.

Hiding in plain sight

Using several steganography techniques, SecreTwit enables one to hide information in plain sight – tweets. Only those who know where to look will be able to read it.

Works anywhere

Since it’s built on Java, it works on all popular platforms – Windows, Linux & Mac OS.

Inspired by Metro

SecreTwit UI is inspired by Metro design language. It has elegant and clean user interface.

How it works

SecreTwit uses several steganography techniques to hide secret message inside a tweet. For the ordinary eye tweet will look just like any other. Only SecreTwit users can see hidden message.

Whitespace steganography

SecreTwit conceals message in tweet by appending whitespaces to the end of the tweet. Each bit of a character is represented with a whitespace – 0 is a tab and 1 is an empty space. Web browsers replace multiple whitespaces with a single space so this will be invisible in the browser. Depending on the length of original message, over 100 bits can be used to hide secret message.

URL steganography

Relying on the fact that people usually won’t look very hard, SecreTwit uses fake bit.ly and twitpic.com URLs to hide parts of the message. Those two services are often used on Twitter so they won’t look strange. Part of the message is Base64 encoded and used to make up URL, so this makes 6 bytes per URL available for hiding messages.

Image steganography

Traditional image steganography technique is used to embed tag within user’s profile image. Tag is later used to determine whether the tweet has a secret message embedded with SecreTwit. Steganography method used here is the most common and simplest form of digital steganography called Least Significant Bit (LSB) method. Binary representation of the message that's to be hidden is written into the LSB of the bytes of the image. The overall change to the image is so minor that it can't be seen by the human eye.