SIMPLIFIED SENDING / RECEIVING: Want to send a message? Open the PixelKnot app directly, and PixelKnot will walk you through the process.

PixelKnot suggests apps it knows will share properly, but you’re welcome to add your own. Note that not all image sharing services can be used with PixelKnot because they modify your images before posting them to their platform.

EASIER SHARING: It’s now easier to share PixelKnot images with the applications you and your friends commonly use.

The release of PixelKnot features an improved user experience: Have the complete message be recoverable no matter how it is transmitted.

Have the bytes of the image appear, to a trained analyst, undistorted so much so as to arouse suspicion. Have the original image appear, to the trained human eye, unedited. The Guardian steganography standard: we are working towards ensuring that the secret message in an image must: F5 employs permutative straddling to uniformly spread out the changes over the whole steganogram. Thus it reduces the number of necessary changes. F5 implements matrix encoding to improve the efficiency of embedding. The newly developed algorithm F5 withstands visual and statistical attacks, yet it still offers a large steganographic capacity. The practice of embedding secret messages into a piece of media so that no one, apart from the sender and intended recipient, know that the secret message exists. Don’t see your language? Join us and help translate the app: WE SPEAK YOUR LANGUAGE: PixelKnot is available for friends who speak many languages.AD-FREE: We want your love, not your money.ATTACK RESISTANT: We’ve tested discovery on images with messages hidden in them using a specialized version of stegdetect, an automated tool for detecting steganographic content in images.MATHEMATICALLY SECURE: We use the steganography algorithm F5 which implements matrix encoding to improve the efficiency of embedding and employs permutative straddling to uniformly spread out the changes over the whole steganogram.FOR YOUR EYES ONLY: Put a password on the secret message to make sure that no one can read it except the person it’s meant for.Even a trained eye will think the image is unedited. DISGUISE YOUR MESSAGES: Pictures are public, the text is hidden inside.This image steganography application features:

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