Independent Domain of Symmetric Encryption using Least SignificantBit : Computer Vision, Steganography and Cryptography Techniques

The rapid development of data transfer through internet made it easier to send the data accurate and faster to the destination. There are many transmission media to transfer the data to destination like e-mails; at the same time it is may be easier to modify and misuse the valuable information through hacking. So, in order to transfer the data securely to the destination without any modifications, there are many approaches like cryptography and steganography. This paper deals with the image steganography as well as with the different security issues, general overview of cryptography, steganography and digital watermarking approaches.  The problem of copyright violation of multimedia data has increased due to the enormous growth of computer networks that provides fast and error free transmission of any unauthorized duplicate and possibly manipulated copy of multimedia information. In order to be effective for copyright protection, digital watermark must be robust which are difficult to remove from the object in which they are embedded despite a variety of possible attacks. The message to be send safe and secure, we use watermarking. We use invisible watermarking to embed the message using LSB (Least Significant Bit) steganographic technique. The standard LSB technique embed the message in every pixel, but my contribution for this proposed watermarking, works with the hint for embedding the message only on the image edges alone. If the hacker knows that the system uses LSB technique also, it cannot decrypt correct message. To make my system robust and secure, we added cryptography algorithm as Vigenere square. Whereas the message is transmitted in cipher text and its added advantage to the proposed system. The standard Vigenere square algorithm works with either lower case or upper case. The proposed cryptography algorithm is Vigenere square with extension of numbers also. We can keep the crypto key with combination of characters and numbers. So by using these modifications and updating in this existing algorithm and combination of cryptography and steganography method we develop a secure and strong watermarking method. Performance of this watermarking scheme has been analyzed by evaluating the robustness of the algorithm with PSNR (Peak Signal to Noise Ratio) and MSE (Mean Square Error) against the quality of the image for large amount of data. While coming to see results of the proposed encryption, higher value of 89dB of PSNR with small value of MSE is 0.0017. Then it seems the proposed watermarking system is secure and robust for hiding secure information in any digital system, because this system collect the properties of both steganography and cryptography sciences.

Health system context and implementation of evidence-based practices-development and validation of the Context Assessment for Community Health (COACH) tool for low- and middle-income settings

Background: The gap between what is known and what is practiced results in health service users not benefitting from advances in healthcare, and in unnecessary costs. A supportive context is considered a key element for successful implementation of evidence-based practices (EBP). There were no tools available for the systematic mapping of aspects of organizational context influencing the implementation of EBPs in low- and middle-income countries (LMICs). Thus, this project aimed to develop and psychometrically validate a tool for this purpose. Methods: The development of the Context Assessment for Community Health (COACH) tool was premised on the context dimension in the Promoting Action on Research Implementation in Health Services framework, and is a derivative product of the Alberta Context Tool. Its development was undertaken in Bangladesh, Vietnam, Uganda, South Africa and Nicaragua in six phases: (1) defining dimensions and draft tool development, (2) content validity amongst in-country expert panels, (3) content validity amongst international experts, (4) response process validity, (5) translation and (6) evaluation of psychometric properties amongst 690 health workers in the five countries. Results: The tool was validated for use amongst physicians, nurse/midwives and community health workers. The six phases of development resulted in a good fit between the theoretical dimensions of the COACH tool and its psychometric properties. The tool has 49 items measuring eight aspects of context: Resources, Community engagement, Commitment to work, Informal payment, Leadership, Work culture, Monitoring services for action and Sources of knowledge. Conclusions: Aspects of organizational context that were identified as influencing the implementation of EBPs in high-income settings were also found to be relevant in LMICs. However, there were additional aspects of context of relevance in LMICs specifically Resources, Community engagement, Commitment to work and Informal payment. Use of the COACH tool will allow for systematic description of the local healthcare context prior implementing healthcare interventions to allow for tailoring implementation strategies or as part of the evaluation of implementing healthcare interventions and thus allow for deeper insights into the process of implementing EBPs in LMICs.

FRÅN HORA TILL HELGON : En litteraturstudie om tre forskares tolkningar och analyser av kvinnliga gestalter i urkunderna för judendom, kristendom och islam som normförmedlare

Arbetet är en litteraturstudie som undersöker hur forskare beskriver kvinnliga gestalter från religiösa urkunder och vilka normer dessa förmedlar. Syftet är att undersöka vilka normer som förmedlas och vilka gestaltningar som lyfts fram, samt att koppla dessa till läroplanens mål kring kön, identitet, sexualitet, socioekonomisk bakgrund, etnicitet, känsla av tillhörighet och mening med religionsvetenskapen. Examensarbetet är en innehållsanalys med kodning som metod för att komma närmare forskarnas tolkningar av kvinnans roll och förutsättningar inom judendomen, kristendomen och islam. Till examensarbetet står tre forskare i fokus som företräder tolkningar av urkunderna från respek-tive religion. Judendomen representeras av Carol Meyers (2013), Rediscovering Eve, ancient israelite women in context. Kristendomen av Elisabeth Schüssler Fiorenza (1999), In memory of her. A feminist theological reconstruction of christian origin, samt islam av Asma Barlas (2002), Believing Women in Islam. Unreading Patriarchal Interpretations of the Qur´an. Litteraturanalysen än indelad utifrån ämnesplansmålen där varje bok analyseras utifrån flera undergrupper för att sedan diskuteras. Fokus i analysen är på forskarnas tolkningar av ur-kunderna, inte av forskarnas utläggning av andra författare, arkeologer eller andra källor. I diskussionen jämförs resultatet från de olika kategorierna och kopplingarna med ämnesplanen med frågeställningarna för att få en bild av kvinnliga gestalter från religiösa urkunder samt vilka normer de förmedlar.