10/27/2022 0 Comments Outguess hide text in photosIn this work, two main aspects are mainly considered- First being the amount and length of the message to be sent. The main challenge of image steganography is to keep the basic properties and visuals of the carrier image unaltered. The main focus is to preserve the integrity of the message to be transmitted. However, beside these misuses of steganography, it is also used widely in many fields such as biometrics- to match and hide fingerprints in respective identity cards of the employees, in digital watermarking, in military applications to transmit information during wartime, etc. The photograph appeared completely normal to the naked eye initially. Later, on analyzing it completely, it was discovered to have some messages embedded in it. In 2011 Mumbai blasts, terrorists used an old photograph of a known Indian actress to hide important information. The recipient has access to various steganography softwares or trained networks to extract the desired message. Secret messages, codes are embedded in cover media and posted on public sites. Terrorists use this technique to communicate among themselves without getting caught by the military. Steganographic techniques have been used as a medium to hide information since long. If that embedded secret message is retrieved from the stego object, it is said to be active steganalysis. On investigating the stego object, if only the absence or presence of secret message is detected, it is passive. Steganalysis can be of two types-passive and active. The more similarity, the better is the steganography. It may or may not be similar to the original media. On applying the steganographic operations on the original media, a stego object is created. Both processes can be done on many different types of digital media such as image file, text messages, audio files, video messages etc. These hidden messages done using steganography are revealed by steganalysis. The minute differences within the pixels of the quilt media from the initial media are not noticeable to the human eye when transmitted through a carrier. The steganography process exploits the properties of the human eye. The goal of modern steganography is to securely transmit a digital message embedding it in a cover media. On observing the quilt media, one cannot work out if there is presence of any secret message embedded in it whereas in cryptography, the transmitted message over a channel is encrypted with a key and on observing it, it is known that the message is encrypted or not. It is the strategy used for concealment or hiding of a message in another cover media. The term steganography was coined centuries ago when messages were physically hidden. Secure transmission of messages is done using various cryptography and encryption techniques. Thus, this work has wide and secure applications in many fields. The network is only trained once, irrespective of the different container images and secret messages given as inputs. Also, other steganography softwares cannot be used to reveal the message since the model is trained using a deep learning algorithm which complicates its steganalysis. The main aspect of this work is it produces minimal distortion to the secret message. The decoder network on the receiving side, which is simultaneously trained with the encoder, reveals the secret image. #OUTGUESS HIDE TEXT IN PHOTOS HOW TO#The encoder neural network determines where and how to place the message, dispersing it throughout the bits of cover image. In this project, along with LSB encoding, deep learning modules using the Adam algorithm are used to train the model that comprises a hiding network and a reveal network. The cover image also called the carrier can be publicly visible. An N * N RGB pixel secret message (either text or image) is to be transmitted in another N * N RGB container image with minimum changes in its contents. The goal in our project is to hide digital messages using modern steganography techniques. Steganography has been used since centuries for concealment of messages in a cover media where messages were physically hidden.
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