In today’s digital world healthcare is one core area of the medical domain. A healthcare system is required to analyze a large amount of patient data which helps to derive insights and assist the prediction of diseases. This system should be intelligent in order to predict a health condition by analyzing a patient’s lifestyle, physical health records and social activities. The health recommender system (HRS) is becoming an important platform for healthcare services. In this context, health intelligent systems have become indispensable tools in decision making processes in the healthcare sector. Their main objective is to ensure the availability of the valuable information at the right time by ensuring information quality, trustworthiness, authentication and privacy concerns. As people use social networks to understand their health condition, so the health recommender system is very important to derive outcomes such as recommending diagnoses, health insurance, clinical pathway-based treatment methods and alternative medicines based on the patient’s health profile. Recent research which targets the utilization of large volumes of medical data while combining multimodal data from disparate sources is discussed which reduces the workload and cost in health care. In the healthcare sector, big data analytics using recommender systems have an important role in terms of decision-making processes with respect to a patient’s health. This paper gives a proposed intelligent HRS using Restricted Boltzmann Machine (RBM)-Convolutional Neural Network (CNN) deep learning method, which provides an insight into how big data analytics can be used for the implementation of an effective health recommender engine, and illustrates an opportunity for the health care industry to transition from a traditional scenario to a more personalized paradigm in a tele-health environment. By considering Root Square Mean Error (RSME) and Mean Absolute Error (MAE) values, the proposed deep learning method (RBM-CNN) presents fewer errors compared to other approaches.

In Agriculture, mostly crops are loss due to the erroneous selection of the crop to be grown in a particular land holding. The farmers are generally not aware of the requirements of the crop i.e. the minerals, soil moisture and other soil requirements. This can cause a distress to farmer both mentally and financially. One more problem that a farmer generally encounters is the pest and diseases that can affect the crops they grow, which they are generally unaware of in an early stage. This problem of farmer is addressed in our paper and we have tried to solve it with the help of a Recommendation System. By the help of our model, we predict the best suitable crop to the farmer and detect the pest that may affect as well as suggest the pest control techniques. In this paper, we have applied SVM classification algorithm, Decision Tree algorithm and Logistic Regression algorithm and we have found that SVM classification model gives the better accuracy as compared to other algorithms.

Many researchers have used the properties of the popular Elliptic Curve Cryptography(ECC) to devise a stronger and faster image encryption algorithm to assure the secrecy of images during online transmission. In this paper, a robust Elliptic curve based image encryption and authentication model for both grayscale and color images has been proposed. The model uses the secure Elliptic Curve Diffie-Hellman(ECDH) key exchange to compute a shared session key along with the improved ElGamal encoding scheme. 3D and 4D Arnold Cat maps are used to effectively scramble and transform the values of plain image pixels. A well-structured digital signature is used to verify the authenticity of the encrypted image prior to decryption. The model produces good-quality cipher images with an average entropy of 7.9993 for grayscale and 7.99925 for the individual components of color images. The model has high average NPCR of 99.6%, average UACI of 33.3% and low correlation for both grayscale and color images. The model has low computational costs with minimized point multiplication operations. The proposed model is robust with high resilience against statistical, differential, chosen-plaintext(CPA), known-plaintext(KPA) and occlusion attacks.

Watermarking techniques have been developed to protect digital images against illegal reproductions and illegal modifications. In this paper, a non-blind digital image watermarking algorithm based on Discrete wavelet transform, Cross chaotic map and Arnold transform, has been described. Initially, Discrete wavelet transformation is done and the medium frequency coefficients are extracted as the embedding field. Then, Arnold's transformation and Cross chaotic sequence are used to encrypt the watermark and the medium frequency coefficients of the watermark image are extracted to be embedded into the original image. It is a kind of non-blind scheme as the extraction needs the original image. Peak signal to noise ratio (PSNR) is used to evaluate the algorithm. The quality of the extracted watermark is evaluated using term Normalized cross-correlation (NC). From the results, it may be concluded that the modified algorithm is resistant enough against the common attacks