Unreadable Form Research Articles

Secret Sharing Based Visual Cryptography Scheme Using CMY Color Space

In the era of internet, internet is widely used by the individual for the communication and the information give and take process. Protecting our data from the unconstitutional processes and keeping the secret information secure and in safe hands, every individual utilizes the cryptography such as symmetric or asymmetric. But, these cryptographic processes needs much more cost for the execution. For that reason, lots of secret sharing schemes were proposed. Secret image distribution is the fine talent and skill concern with the protection of important color images by dividing the secret in multiple copies. The basic fundamental behind the scheme is to change the color image into some multiple unreadable format type shares so that they can not reveal the information inside the image until it is again combines with some mathematical computation. A Secret Sharing Scheme can be estimated by it's the four conditions which are Security, Reconstruction Precision, Computation Complexity, Storage Requirement. In Most of the previous scheme there were issues related with security of image for the reconstruction means user can reveal secret from the hidden image, reconstructed of image quality i.e. contrast or accuracy; it means the reconstructed images were distress from the loss of info related to images and resultant image is different from the original image. Images also suffered from pixel expansion issues for which data loss was occurring. In the present work CMY color model will be implemented with ((n-1), n) secret sharing scheme based on visual cryptography for the color image and compared and proved to be better that the RGB color model which is free from the issue of security, pixel expansion and accuracy issue as well. As the printer use the Cyan, Magenta, Yellow and Black color for printing that's why CMY color model is implemented in this work to prove that CMY color space is better than RGB color space.

Analysis and Implementation of Combined Approach of RSA and ECC Algorithm for Enhanced Data Security

Cryptography is one of the important and useful technique in which usually a particular file is converted into unreadable format by using public key and private key system called as public key cryptosystem. Then as per the user requirement that file is send to another user for secure data or file transmission between original sender and receiver. In this transmission file of unreadable format is send, after receiving this file receiver used the similar algorithm technique and private key for getting the original file data. In this procedure various algorithms are used as a processing function and depending on that algorithm, used the private key. The power or strength of any algorithm is depending on the secret key used in sender client and receiver side client. For this type of secure transmission we traditionally used RSA algorithm which is more secure for use so most of the system used the same type of algorithm for secure way of communication. Even most of the financial transaction is done by the use of this algorithm as it used the strong key while encryption and decryption. But In today‟s new digital world there is a numerous growth in the use of the Internet service. Behind every software generator there is lots of hacker present. So, very little amount of time will be enough to explore the security. Hence we require more strong and complex algorithms, which provide the security the Internet work of transmitting and receiving. So this proposed system enhanced the security of existing RSA algorithm by using elliptical curve cryptography (ECC) algorithm. This system secures the important data of the administrator and safely sends to the registered user by text encryption and image encryption. Also proposed system provide good authentication for the user.

A Secured and Searchable Encryption Algorithm for Cloud Storage

computing is a new generation technology which efficiently support the client oriented services. Now in these days there are a number of applications which consumes the cloud storage service for storing and retrieving information. In such conditions the data owner management and privacy preservation cryptographic techniques are utilized frequently. But due to cryptographic technique of security implementation the data leave their own format and converted into other unreadable format. Due to this retrieval of required information becomes complex. Therefore in this paper a proposed solution incorporate the hash table management and indexing techniques to keep track the actual data contents in terms of document features which may help for encrypting user data and identifying the user data and privacy. Keywordscomputing, MD5, AES, Cloud storage.

The RC7 Encryption Algorithm

Cryptography can be defined as the art of secret writing or protecting information by transforming it (encrypting it) into an unreadable format, called cipher text and then transmitting it across insecure networks, so that it cannot be read by anyone except the intended recipient. Only those who possess a secret key can decipher (or decrypt) the message into plain text. Encrypted information can sometimes be broken by cryptanalysis, also called code breaking, although modern cryptography techniques are virtually unbreakable. Various algorithms help achieve flawless encryption results which are mostly unbreakable. This paper is an attempt to improve one such algorithm, i.e. RC6 by adding on to its existing functionalities.

Implementation of LiSP using Park-Miller for Wireless Sensor Network

Wireless sensor networks continuous to grow and a rosining technology in networks. WSN used in many critical situations and applications. One of major application of the sensor network is use in military. Due to these reason securities is a major challenge for WSN. Wireless sensor networks have many topics to do the research but security plays an important role in data and network security. In the present work, author use the block cipher rather than stream cipher, and key to perform encryption and decryption operation to create lightweight security protocol. Encryption algorithm takes two inputs, one is the text enter by the user another one is the dynamic key. Dynamic key has one most important advantage is that for each pair of the encryption and decryption new key is generated and previous one is discarded. In this paper dynamic key is generated by using park-miller random number generator. In the present work the key of 196 bits is used. This key is mainly used to convert the text entered by the user into the unreadable form. In this paper author divides the input plaintext into 49 bits of blocks. Dynamic key is following the concept of one time pad. Different key is used for the different parts of the plaintext so it is difficult and make it harder to break the security of data. General Terms Sensor Network, Park-miller

Secure Crypto and ECG Steganography Based Data Communication for Wireless Body Sensor Network

The acquisition, processing and secure transmission of a patient’s physiological and physical parameters to a remote location has been done by Patient Tele monitoring System (PTS). The PTS uses the wireless channel for communication of patient’s data which is not secure as wireless channel is open for information being hacked by unauthorized person easily , where there is no patient’s privacy thereby this project proposes the improvement of protection system for secret data communication through encrypted data concealment in ECG signals. The proposed encryption technique is the chaos cryptography technique which encrypts the confidential data in to unreadable form and it is concealed in to the high frequency coefficient of the Wavelet decomposed ECG signals by the data hider. The reversible data hider technique and LSB replacement algorithm is used for concealing the secret message bits into the high frequency coefficients. In the data extraction module relevant key is used to extract the secret data and decryption keys are used to get back original information .Finally the performance of the proposed technique and existing technique is analyzed based on image, data recovery and time consumption.

IJARCCE - Computer and Communication Engineering

Image data security is the essential portion in communication and multi media world. During storing and sharing, avoid third party access of data is the challenge one. Providing security of data is the clever work and art also. Many protection algorithms are used in recent years. Protection may be given of a data is converting the original in to some unknown form, signals, sketch etc., which is not understand by any one. Cryptography is the best technique of image data security. In Greek, crypto refers hidden and graphy refers script. Cryptography has two processes namely encryption and decryption. Encryption achieves the conversion by possessing a key of original data into unreadable form called encoding. Restoring of encrypted data in to original is decoding or decryption. Key, code or password is the vital role in cryptography. This paper presents the performance of encryption and decryption of an image using a single key algorithm and tested on some images and shows fine results.

Multiple Selective Regions Image Cryptography on Modified RC4 Stream Cipher

Cryptography is the technique which is utilized for secure communication over the network. By using Cryptography technique readable information is converted into an unreadable form. Cryptography is used to protect data from unauthorized access. Universality of security in modern internet based application is an explicit motivation to contribute in the area of Information Security. Multimedia data contain different types of data that include text, audio, video, graphic, images. This paper gives an initiation of an amending technique for multiple selective region image cryptography based on both RC4 stream cipher and chaos. This approach is derived from the standard RC4 algorithm. But Currently RC4 is vulnerable. So for making image encryption technique more secure, we have proposed RC4 with chaos. We have shown that, our proposed method will boost image security over any type of network with several types of attack.

Cloud Data Sharing in a Dynamic Group with a Dual Secure Technology

Cloud data sharing is an untrustworthy service where any malicious user can access the data from cloud storage and make use of it so an encryption technique is used to convert data into a unreadable format but an hacker uses an different technique to decrypt the data. So a steganography is introducing in cloud storage centre where the group member encrypt the data and send it to the cloud server, the server receive it and hide it in to an image. Data of the different owners in the group shares data with each other securely and preserving their identity from an untrusted cloud server is one of the challenging issues currently, due to the frequent change of the membership. In this paper, we propose a secure multiowner data sharing scheme for dynamic groups in the cloud. By aid of group signature and dynamic broadcast encryption techniques, any cloud user can anonymously share data with others. In addition to the dynamic broadcast encryption techniques we are using image Steganography to store the data in the form of image in the cloud storage.

Survey Paper of Encrypted Data Hiding using Skin Tone Detection

Steganography is the skill of hiding the existence of data in other transmission medium to attain secret communication. It does not restore cryptography but quite boost the security using its abstruse features. In this paper we have surveyed on a Steganography and cryptography techniques which provide highly secure skin tone data hiding. Biometric characteristic used to apply steganography is skin tone region of images. Here important data is implanted within skin region of image which will give an outstanding secure location for data hiding. For this skin tone detection is need to be performed. Different steps of data hiding can be applied by cropping an image interactively. Cropping of an image improved security than hiding data without cropping the whole image, so cropped region works as a key at decoding region. Cryptography algorithm is used to convert the secret messages to an unreadable form before embedding; which provides a strong backbone for data security. This survey paper focuses on illuminating the technique to secure data or message with authenticity and non repudiation. So with this object oriented steganogaphy we track skin tone objects in image with the higher security and satisfactory PSNR .Modern steganography’s goal is to keep its mere presence undetectable.

Asymmetric Key Cryptography

Cryptography is a method of encrypting and decrypting the data. It is a science of protecting information by encrypting the data into an unreadable form. Cryptography enables you to transmit the data over the unsecured network like Internet in such a way that no other than the intended recipient can read it. The plain text or the message is encrypted through the encryption technique which converts the message into the cipher text. When the recipient receives the cipher text, he decrypts it and gets the original message. Plaintext →Encryption → Cipher text →Decryption → Plaintext

Information Hiding using Least Significant Bit Steganography and Blowfish Algorithm

Security is the most challenging aspects in the World Wide Web. In present time information sharing and transfer has increased exponentially. So to find out best solution this is providing necessary protection of our data against malicious attacks from intruders. Cryptography and Steganography are the two major techniques for secret communication. Cryptography converts information from its original form (plaintext) into unreadable form (cipher text); where as in steganography the secret message is hidden into the cover medium. There are many different techniques are available for cryptography and stagnography. In this paper two techniques BLOWFISH algorithm for cryptography and LSB approach for stagnography are used. First encryption of data is done by using BLOWFISH algorithm which is one of the most powerful techniques and then hide encrypted message using LSB approach. Our proposed model gives two layers of security for secret data.

CRYPTOGRAPHY

To prevent the dissemination of sensitive information from the database to unauthorized users or outside competitive or hostile agents, an organization must establish effective security policies. The art of protecting information by transforming it into an unreadable format, called cipher text. Only those who possess a secret key can decipher (or decrypt) the message into plain text. Encrypted messages can sometimes be broken by cryptanalysis, also called codebreaking, although modern cryptography techniques are virtually unbreakable. Database security policies are guidelines for present and future decisions regarding the maintenance of the database security. Database security mechanisms are the functions used to enforce the database security policies. There are number of security policies that can be applied on data in order to protect the data against unauthorized access. Protecting the data is the prime need of an organization.

Image Steganography using DWT and Blowfish Algorithms

We propose a steganography technique which embeds the secret messages in frequency domain. Unlike the space domain approaches, secret messages are embedded in the high frequency coefficients resulted from Discrete Wavelet Transform. A cryptography algorithm is used to convert the secret messages to an unreadable form before embedding. These algorithms keep the messages from stealing, destroying from unintended users on the internet and hence provide satisfactory security. Blowfish algorithm is used for encryption and decryption of text message using a secret-key block cipher. Blowfish is an evolutionary improvement over DES, 3DES, etc designed to increase security and to improve performance. This algorithm uses a variable key size up to 448 bits.

A transmission security framework for email-based telemedicine.

Encryption is used to convert an email message to an unreadable format thereby securing patient privacy during the transmission of the message across the Internet. Two available means of encryption are: public key infrastructure (PKI) used in conjunction with ordinary email and secure hypertext transfer protocol (HTTPS) used by secure web-mail applications. Both of these approaches have advantages and disadvantages in terms of viability, cost, usability and compliance. The aim of this study was develop an instrument to identify the most appropriate means of encrypting email communication for telemedicine. A multi-method approach was used to construct the instrument. Technical assessment and existing bodies of knowledge regarding the utility of PKI were analyzed, along with survey results from users of Queensland Health's Child and Youth Mental Health Service secure web-mail service. The resultant decision support model identified that the following conditions affect the choice of encryption technology: correspondent's risk perception, correspondent's identification to the security afforded by encryption, email-client used by correspondents, the tolerance to human error and the availability of technical resources. A decision support model is presented as a flow chart to identify the most appropriate encryption for a specific email-based telemedicine service.

Taking a lesson from stealthy rootkits

Attackers use rootkits and obfuscation techniques to hide while covertly extracting information from commercial applications. The authors describe how developers can use similar obfuscation approaches to build more agile, less vulnerable software. Obfuscation deliberately transforms software into an identically functioning, but purposefully unreadable form, implemented in a high-level programming language at the machine-instruction level, or, to some extent, in the compiled binary. Obfuscation's only requirement is that its generated code be functionally equivalent to its parent.