Standard Picture Encryption And Decryption

being attacked, encrypt it with a secret key to obtain an encrypted bit stream . For that AES encryption is used. After AES encryption, will embed at the fourth bit position of . Some related information about the mosaic image generation process into the mosaic image for use in the secret image recovery process are also embed at the last fourth bit position of . Such information, described as a bit stream I like M, includes the following data items: 1) encryption key; and 2) total length of before encryption. After all this process Target image with mosaic image, residual value and all information that required to recover original image are transmitted to receiver

Utilising cryptography to secure medical images and prevent both tampering and the re-identification requires a two step process involving the insertion of cryptographic algorithms and watermarking onto the image, this is able to completed without amending or hindering the pixel quality and retaining the integrity of the images (Kester et al., 2015). Additionally, the watermark can be encrypted using an advanced encryptions standard (AES) to assist in maintaining patient privacy from being re-identified (Abd-Eldayem,

Information security is a major concept in today’s industrial and computer era, so security must be higher to protect the confidential data. Information security plays major role in computer and network security with the use of different cryptography algorithms that includes the encryption and decryption of data with the uses of the algorithm and the key. By means of text or numerical key for the encryption can be dangerous because with the several hack attacks that a key can be broken. So I have proposed a new mechanism that will replace the text key with the image pixels and can gain high security which cannot be easy to break without prior knowledge.

Pressures are mounting for organizations to implement encryption solutions. With the staggering costs of data loss, encryption projects are on the rise. Using encryption as a tool to protect information and prevent data loss is certainly not a new tactic. Data breaches are happening every day, around the world. So why is it important today? Using encryption as a tool to protect information and prevent data loss is not a new tactic (Skinner , Eric, 2008) . There are many reasons now that make encryption more important than ever. Data being breached is happening everyday around the world. There isn’t a day that doesn’t go by that I don’t hear something in the news about something being breached. Or information being leaked and every year breaches are becoming more costly. There are several types of data encryption used in today’s world. Some of these are file and folder encryption, e-mail encryption, full-disk encryption, mobile data encryption, cloud encryption, and application encryption.

Image Steganography: In today’s digital world secret messages get embedded in to the digital image which is called as Image Steganography where cover object used is Image . Because of the limited power of the Human vision system this method is most commonly used [5].

In the present world lot of multimedia data is exchanged on internet and the percent of image data in that is highest. So we need to securely transmit that and this can be achieved by Image encryption.

            Some data is very sensitive and therefore it has to be hidden away from parties who are not supposed to view it. In this age of computers, their capacity for transfer and retrieval of information may be exploited by other parties to gain access to confidential and potentially dangerous data. Therefore, measures have been taken to ensure that data is not accessed by others which is done by using several methods which, besides physical security, includes the use of encryption algorithms which are programs that change the way information looks by rendering it illegible.

Data security has been a prevalent issue and there were many academic and institutional researches that are carried out to identify potential solutions that could help in mitigating the risks of data security challenges. Cryptography has been one of the techniques that has been adapted for data security management, and in this research review, the focus has been on one of the new cryptographic algorithm that has been proposed for file transfers and the paper has been reviewed in detail to understand the process of the proposed new algorithm, the depiction of the test results which show that the proposed technique is better performing than the DJSA and AES methods of encryption. A detailed review of the research paper has been conducted and the conclusions have been detailed in this research report.

The process of Visual Cryptography, as developed through the original algorithm [12], was designed to be used with binary images. This is illustrated from the nature of the shares and the encryption process documented previously. If the secret messages being encoded contain text or binary images, the process shown in the original algorithm works well. However, the world is not composed of solely black and white pixels. With the increasing production of images in the digital age, gray and colour images have a pressing need for encryption and protection as much, or more, as binary images.

The algorithms are called Keygen, Encode, and Distance. Keygen is a probabilistic algorithm that is ran by a client to setup the scheme. Keygen generates a secret key along with a distance threshold and passes it to the Encode algorithm. With Encode, a deterministic algorithm, plaintext is encoded with the previous key by the client. During the last phrase, Distance, the server takes two encodings, one for plaintext and the other for distance to carry out the encryption. The authors went on to present two efficient implementations of DPE, one for dense media types, such as images, and the other for sparse media, such as text. Both implementations proved a secure realization of DPE. Without DPE MIE would be useless, as the users information would still be leaked.

We have also analyzed that without making motion vectors encryption, we can’t get temporal redundancy. Motion vector encryptions are proposed by many authors [4-9]. However, analysis shown in this paper said that 45-50% of motion vectors for each frame are not encrypted. Thus, better encryption method is proposed at here in expense with compression bandwidth. Overall, we have to make the balance between security and increase in compression bandwidth.

We have also analyzed that without making motion vectors encryption, we can’t obtain temporal redundancy. Motion vector encryptions are proposed by several authors [4-9]. However, analysis shown in this paper said that 45-50% of motion vectors for each frame are not encrypted. Thus, a better encryption method is proposed at here in expense with compression bandwidth. Overall, we should create the balance between security and the increase in compression bandwidth.

Visual Cryptography is a type of cryptographic scheme used to encode a secret image into shadow images called shares or layers such that it can’t be decrypted using the human visual system unless certain qualified subsets of the shares are used. The secret image is encoded without the use of any cryptographic computations. In this paper we will discuss the basic model of visual cryptography and the extended model; using the k out of n scheme.

Abstract—This paper involves the work done in the field of development of secure and better cryptographic algorithms for digital data like images. The paper presents a technique and its application in binary plane decomposition and two image encryption schemes. One scheme is simple and other provides high security. This proposed work achieves lossless image encryption. The paper has been carried out by dividing into five subsections: i) Introduction, ii) Literature Review iii) Proposed Methodology iv) Simulation Results v) Conclusion.

AN ALGORITHM TO OVERLAP THE ORIGINAL IMAGE DATA BY UNDISCLOSED SURFACE IMAGE DATA FOR SECRECY