CAPTCHA AS GRAPHICAL PASSWORDS—A NEW SECURITY PRIMITIVE BASED ON HARD AI PROBLEMS

Many security primitives are based on hard mathematical problems. Using hard AI problems for security is emerging as an exciting new paradigm, but has been under-explored. In this paper, we present a new security primitive based on hard AI problems, namely, a novel family of graphical password systems built on top of Captcha technology, which we call Captcha as graphical passwords (CaRP). CaRP is both a Captcha and a graphical password scheme. CaRP addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual-view technologies, shoulder-surfing attacks. Notably, a CaRP password can be found only probabilistically by automatic online guessing attacks even if the password is in the search set. CaRP also offers a novel approach to address the well-known image hotspot problem in popular graphical password systems, such as PassPoints, that often leads to weak password choices. CaRP is not a panacea, but it offers reasonable security and usability and appears to fit well with some practical applications for improving online security

A Biologically Active Surface Enzyme Assembly that Attenuates Thrombus Formation

Activation of hemostatic pathways by blood‐contacting materials remains a major hurdle in the development of clinically durable artificial organs and implantable devices. Here, it is postulated that surface‐induced thrombosis may be attenuated by the reconstitution onto blood contacting surfaces of bioactive enzymes that regulate the production of thrombin, a central mediator of both coagulation and platelet activation cascades. Thrombomodulin (TM), a transmembrane protein expressed by endothelial cells, is an established negative regulator of thrombin generation in the circulatory system. Traditional techniques to covalently immobilize enzymes on solid supports may modify residues contained within or near the catalytic site, thus reducing the bioactivity of surface enzyme assemblies. In this report, a molecular engineering and bioorthogonal chemistry approach to site‐specifically immobilize a biologically active recombinant human TM fragment onto the luminal surface of small diameter prosthetic vascular grafts is presented. Bioactivity and biostability of TM modified grafts is confirmed in vitro and the capacity of modified grafts to reduce platelet activation is demonstrated using a non‐human primate model. These studies indicate that molecularly engineered interfaces that display TM actively limit surface‐induced thrombus formation. A biologically active thrombomodulin surface assembly to limit interfacial thrombin production was generated on the lumen of clinical ePTFE vascular grafts by site‐specific covalent immobilization. Therapeutic capacity of this biomimetic surface engineering approach to attenuate thrombus formation was demonstrated in a clinically relevant in vivo model of prosthetic graft thrombosis.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/89494/1/4736_ftp.pd

Stock Market Prediction Using LSTM and Sentiment Analysis

Prediction and analysis of stock market data is paramount in today’s day and age. Since the economic interactions are too complex for shallow neural networks this paper implements Long Short Term Memory (LSTM) neural networks. LSTM is chosen as it helps to vectorise the data and thus give better predictions. We’ve also utilised other algorithms to show the effectivity of each of these algorithms pitted against LSTM. A very important factor to consider while predicting the stock market is the mood of the people. A person’s emotions have the power to influence the stock market. Sentiment analysis on twitter is used to identify a correlation amongst the future of the stock and the general public’s mood. Our paper works on comparing the sentiment analysis and the predicted stock value and showing that the two are rather similar and that people’s emotions affects the future of the stock prices and to do a comparative study between prediction with and without using the results of the sentiment analysis

Constructing a Study Buddy Using MERN (MongoDB, Express.js, React, Node.js) Stack Technologies

The “Study Buddy” project innovates by creating a dynamic web application that cultivates collaboration and support within the student community. This initiative harnesses the full potential of the MERN (MongoDB, Express.js, React, Node.js) stack to optimize student interactions, accelerate the learning process, and assist with a broad spectrum of academic and non-academic requirements. It revolutionizes how students engage, enabling them to share knowledge, pose queries, and offer assistance, ensuring robust security through authentication and authorization. Additionally, it empowers students to voice their concerns, propose groundbreaking ideas, and forge meaningful connections. This initiative fosters an inclusive and vibrant student environment, where information flows artlessly, challenges are met head-on, and students can thrive academically and beyond

Novel Route to Functionalized Cyclooctanoids via [5+3] Cycloaddition

The self-dimerization of 3-oxidopyrylium leading to stereocontrolled formation of highly functionalized cyclooctanoids is described. Different functionalities were introduced on the dimer (3) and the stereochemical outcome was determined by single-crystal X-ray analysis. It is noteworthy that the hydrogenation of 3 in ethanol solvent gave the transannulated product 5, whereas the expected dihydro product 4 was obtained when the reaction was run in nonnucleophilic solvents. The mechanistic pathway is discussed

Novel Route to Functionalized Cyclooctanoids via [5+3] Cycloaddition

The self-dimerization of 3-oxidopyrylium leading to stereocontrolled formation of highly functionalized cyclooctanoids is described. Different functionalities were introduced on the dimer (3) and the stereochemical outcome was determined by single-crystal X-ray analysis. It is noteworthy that the hydrogenation of 3 in ethanol solvent gave the transannulated product 5, whereas the expected dihydro product 4 was obtained when the reaction was run in nonnucleophilic solvents. The mechanistic pathway is discussed

Novel Route to Functionalized Cyclooctanoids via [5+3] Cycloaddition

The self-dimerization of 3-oxidopyrylium leading to stereocontrolled formation of highly functionalized cyclooctanoids is described. Different functionalities were introduced on the dimer (3) and the stereochemical outcome was determined by single-crystal X-ray analysis. It is noteworthy that the hydrogenation of 3 in ethanol solvent gave the transannulated product 5, whereas the expected dihydro product 4 was obtained when the reaction was run in nonnucleophilic solvents. The mechanistic pathway is discussed