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Hide and Encrypt Secret Text Messages in Image using Android Phone

Everyone wants privacy in the world of internet and sharing. There are many ways you can hide your private data and secure your devices from unauthorised access. Messaging sevices like Whatsapp now uses end to end encryption. But today we are not talking about any messaging app or a VPN. Today in this video i will show you How you can share secret and special messages with your friends or special one by Hiding your message in a Picture along with a secret password to unlock it. While for everyone else it’s just a pretty picture.

Today in this post i will show you how you can hide secret messages in any Picture. Whether it’s a jpeg or png and share it with anyone by protecting it via password. This way only authorised person can see the hidden secret message and to everyone else it’s just a simple picture.

How to Hide or Encryot Messages in any Image using Android

You can do this now using an app developed by the Guardian Project that make secure mobile apps and open-source code. App is called Pixelknot. It is a free Android application which is also ad free that allows users to hide short text-based messages in photographs and share them across trusted channels.

The Pixelknot hides the message by twisting the pixels in the image but no one can detect or differentiate with their eyes. You can add password to the image so that only authorised person can see the secret hidden message. You can use the camera to take photos, or just use photos you’ve already taken.

Moreover, Pixelknot uses 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.

PixelKnot claims that it’s ATTACK RESISTANT and that they’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. But i am not sure about it.

The Image with hidden message should be sent in high quality in order to recieve message. Not all image sharing services can be used with PixelKnot because they modify your images before posting them to their platform. You can share the images over email, file sharing, social media or directly through Bluetooth or NFC? The messages are recoverable on the other side using the PixelKnot app.


Although softwares and applications are developed to combat the latest threats and eliminate bugs but no technology is 100% foolproof. For maximum security and anonymity, users must utilize best practices to keep themselves safe. The Guardian Project says that PixelKnot is still an experimental application and should not be used in real world deployments. Overall it’s nice app with simple user interface and you will find it very easy to use.

So just give it a try, it’s available on Play Store and let me know what you think about this app in the comments down below. You can also visit our YouTube channel for more such How to guides. Please Subscribe to our channel if you haven’t already. Also Like, share and do follow us on Facebook and twitter for quick updates.

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Written by Ravi Singh

An Avid learner, a Tech Enthusiast and the founder of TechPosts Guides, Ravi is a Raspberry Pi fan and an open-source lover. He spends most of his weekends working with IoT devices and playing games on the Xbox. He is also a solo-traveler who loves hiking and exploring new trails.
Follow him on .Twitter, Facebook, and YouTube.

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