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RISS 인기검색어
- 검색키워드
- 저자 : Ranu Agrawal (검색결과 2 건)
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An Ethical Approach of Block Based Image Encryption Using Chaotic Map
Kamlesh Gupta,Ranu Gupta,Rohit Agrawal,Saba Khan 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.9
In present era all the multimedia communication is done over open network such as Images, Audio, Videos, Text etc, so the security is also a major concern. In this research we proposed an image encryption algorithm by using chaotic map as it is well known for its Dynamic nature, Randomness and very sensitive towards initial condition. In the pro-posed algorithm two dimensional chaotic map and the two secrets keys for encryption of image are used in which first we divide the image into four blocks and then each block of the image is encrypted individually in n times, after that the keys are inverted for each block and repeat this process up to m times. The proposed work has been rigorously examined over the prevalent standard test and has encouragingly succeeded to pass most of them like key sensitivity analysis, statistical analysis, differential analysis, entropy analysis, which make the proposed algorithm good enough for real time secure communication.
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Nazia Tarannum,Deepak Kumar,Ranu Agrawal 대한암예방학회 2023 Journal of cancer prevention Vol.28 No.2
Herein, an instrument free facile acid-base titrimetric methodology is reported for lysophosphatidic acid (LPA) measurement in serum and plasma samples for ovarian cancer detection. The concept is based on the titrimetric method in which alkaline solution was titrated with free fatty acid. Free fatty acid is generated due to action of the lysophospholipase to LPA. A phospholipid derivative known as LPA can function as a signaling molecule. A glycerol backbone serves as the foundation for phosphatidic acid, which also has bonds to an unsaturated fatty acid at carbon-1, a hydroxyl group at carbon-2, and a phosphate molecule at carbon-3. Free fatty acid and glycerol-3-phosphate are formed when LPA reacts with lysophospholipase. The formation of free fatty acid depends on the concentration of LPA. The standard graph of known concentrations of LPA, LPA spiked serum and LPA spiked plasma was plotted. The concentration of LPA in unknown serum and plasma were calculated from the standard graph. The limit of detection of LPA in spiked serum and plasma samples via titrimetric assay was calculated as 0.156 μmol/L. A patient's chance of survival may be outweighed by an early diagnosis of ovarian cancer.
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