AU2021107010A4

AU2021107010A4 - A method for an image steganography with an rsa encryption

Info

Publication number: AU2021107010A4
Application number: AU2021107010A
Authority: AU
Inventors: Aparna Dongare; Atharva Dongare
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2021-12-02
Anticipated expiration: 2029-08-24

Abstract

The present disclosure relates to a method for an image steganography with an RSA encryption. The method 100 comprises the following steps: at step 102, picking a cover image and a secret message for a bedding and using an RSA technique to encrypt the message; at step 104, determining significant bits of each of an RGB pixel from a cover image, and involving a hash function on an LSB of the cover picture to get a position; at step 106, using the position acquired from the hash function and wherein the eight bits of the encrypted message are embedded into four bits of LSB of RGB pixels of the cover image; and at step 108, sending a stego image to a receiver. 10 A4 Ah Ut * A* .0

Description

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A METHOD FOR AN IMAGE STEGANOGRAPHY WITH AN RSA ENCRYPTION FIELD OF THE INVENTION

The present disclosure relates to a method for an image steganography with an RSA encryption.

BACKGROUND OF THE INVENTION

Steganography is a method of storing data that is intended to be communicated in a picture, typically through manipulating pixel IDs to blend in with the image without substantial distortions while still representing the original data when these numbers are recombined. A major limitation. The stored data in the photos was not secured, making it simple for anyone to reassemble the entire data back into its original form using a brute force method.

In order to make the existing solutions more efficient there is need to develop a method for an image steganography with anRSA encryption.

SUMMARY OF THE INVENTION

The present disclosure relates to a method for an image steganography with an RSA encryption. The data is first encrypted using the commonly used encryption algorithm, RSA. RSA will encrypt the entire message with a public key and embed the data in the image using the least significant bit encoding method, resulting in the fewest number of distortions in the image and making it less suspicious to the human sight. When the data is received, the recipient will use the private key to decrypt the information provided by the sender.

In an embodiment, a method 100 for an image steganography with an RSA encryption, wherein, the said method comprises the following steps: at step 102, picking a cover image and a secret message for a bedding and using an RSA technique to encrypt the message; at step 104, determining significant bits of each of an RGB pixel from a cover image, and involving a hash function on an LSB of the cover picture to get a position; at step 106, using the position acquired from the hash function and wherein the eight bits of the encrypted message are embedded into four bits of LSB of RGB pixels of the cover image; and at step 108, sending a stego image to a receiver.

To further clarify advantages and features of the present disclosure, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.

BRIEF DESCRIPTION OF FIGURES

These and other features, aspects, and advantages of the present disclosure will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

Figure 1 illustrates a method for an image steganography with an RSA encryption in accordance with an embodiment of the present disclosure. Figure 2 illustrates a block diagram of Image Steganography With RSA Encryption by an embodiment of the present disclosure;

Figure 3 shows the RSA pixel of the cover image. Figure 4 illustrates the Process Flow chart of RSA Encryption. Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have necessarily been drawn to scale. For example, the flow charts illustrate the method in terms of the most prominent steps involved to help to improve understanding of aspects of the present disclosure. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

DETAILED DESCRIPTION:

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be restrictive thereof.

Reference throughout this specification to "an aspect", "another aspect" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or sub-systems or elements or structures or components proceeded by "comprises...a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.

Embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings.

Referring to Figure 1 illustrates a method for an image steganography with an RSA encryption in accordance with an embodiment of the present disclosure. The method 100 for an image steganography with an RSA encryption, wherein, the said method comprises the following steps: at step 102, picking a cover image and a secret message for a bedding and using an RSA technique to encrypt the message; at step 104, determining significant bits of each of an RGB pixel from a cover image, and involving a hash function on an LSB of the cover picture to get a position; sp 106, of using the position acquired from the hash function and wherein the eight bits of the encrypted message are embedded into four bits of LSB of RGB pixels of the cover image; and step 108 of sending a stego image to a receiver.

In an embodiment, the method, wherein, wherein, the method employs a hash function to build a pattern that hides a data bits in the cover image's LSB of RGB pixel values and wherein, the method ensures that before disguising the message behind the cover image, the message has been encrypted.

In another embodiment, the method, wherein, the method is a safe means to convey the data without revealing it to anyone other than the data receiver and wherein, the method is a high-security means for sending a large amounts of data across a vast distances.

In yet another embodiment, the method, wherein, the RSA will encrypt the message with a public key and use a least significant bit encoding method to embed the data in the cover image, thus causing a least amount of distortions in the actual cover image and making it less suspicious and wherein, when the data is received by the receiver, the receiver will utilize the private key to decrypt the data in the message sent by a sender.

Figure 2 illustrates a block diagram of Image Steganography With RSA Encryption by an embodiment of the present disclosure. Figure 3 shows the RSA pixel of the cover image. Figure 4 illustrates the Process Flow chart of RSA Encryption. The process is described below: The procedure is repeated until the entire bit message is incorporated in the cover picture 2.

Step 1: Selecting a cover image and a secret message for embedding Step 2: Use the RSA technique to encrypt the message. Step 3: From the cover image, find the four least significant bits of each RGB pixel. Step 4: To get the position, use a hash function on the LSB of the cover picture. Step 5: Using the position acquired from the hash function and wherein the eight bits of the encrypted message are embedded into four bits of LSB of RGB pixels of the cover image. Step 6: Send the stego image to receiver.

In an embodiment, the embedding is in a predetermined order, prefereably in 3, 3 and 2, respectively.

The drawings and the forgoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, orders of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts necessarily need to be performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples. Numerous variations, whether explicitly given in the specification or not, such as differences in structure, dimension, and use of material, are possible. The scope of embodiments is at least as broad as given by the following claims.

Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all the claims.

Claims

WE CLAIM:

1. A method for an image steganography with an RSA encryption, wherein, the said method comprises: picking a cover image and a secret message for a bedding and using an RSA technique to encrypt the message; determining significant bits of each of an RGB pixel from a cover image, and involving a hash function on an LSB of the cover picture to get a position; using the position acquired from the hash function and wherein the eight bits of the encrypted message are embedded into four bits of LSB of RGB pixels of the cover image; and sending a stego image to a receiver, wherein, the method employs a hash function to build a pattern that hides a data bits in the cover image's LSB of RGB pixel values.

2. The method as claimed in claim 1, and wherein order of embedding is in a predetermined order, and preferably in 3, 3 and 2, respectively.

3. The method as claimed in claim 2, wherein, the method ensures that before disguising the message behind the cover image, the message has been encrypted.

4. The method as claimed in claim 1, wherein, the method is a safe means to convey the data without revealing it to anyone other than the data receiver.

5. The method as claimed in claim 1, wherein, the method is a high security means for sending a large amounts of data across a vast distances.

6. The method as claimed in claim 1, wherein, the RSA will encrypt the message with a public key and use a least significant bit encoding method to embed the data in the cover image, thus causing a least amount of distortions in the actual cover image and making it less suspicious.

7. The method as claimed in claim 6, wherein, when the data is received by the receiver, the receiver will utilize the private key to decrypt the data in the message sent by a sender.

picking a cover image and a secret message for a bedding and using an RSA 102 technique to encrypt the message;

finding a four least significant bits of each of an RGB pixel from a cover image and 104 using a hash function on an LSB of the cover picture to get a position;

using the position acquired from the hash function, embedding eight bits of the 106 encrypted message into four bits of the LSB of the RGB pixels of the cover image in an order of 3, 3 and 2, respectively; and

sending a stego image to a receiver. 108

Figure 1

Sentence For Input

Getting a Single Letter

Using RSA to get 3 digit encoded values in digits

Replace the LSB in every pixel by the received 3 digit encrypted values

The Private key from RSA encryption will be stored in the end of the image in the pixel

Figure 2

Figure 3

Figure 4