Performance evaluation of deep neural network on malware detection: visual feature approach.

Nowadays, several malicious applications target computers and mobile users. So, malware detection plays a vital role on the internet so that the device is secure without any malicious activity affecting or gathering the useful content of the user. Researches indicate that the vulnerability of adversarial attacks is more in deep neural networks. When there is a malicious sample in a family, there will not be many changes in the variants, but there will be more signatures. So, a deep learning model, DenseNet was used for detection. The adversarial samples are created by other types of noise, including the Gaussian noise. We added this noise to a subset of malware samples and observed that for Malimg, the modified samples were precisely identified by the DenseNet, and the attack cannot be done. But for BIG2015, we found that there was some marginal decrease in the performance of the classifier, which shows that the model performs well. Further, experiments on the Fast Gradient Sign Method (FGSM) were conducted, and it was observed that a significant decrease in classification accuracy was detected for both datasets. We understand that deep learning models should be robust to adversarial attacks.

Chronic folliculitis - A clinico-epidemiological study.

50 male patients, diagnosed to have chronic folliculitis of legs (CFL), were included in a clinico epidemiological study. CFL affected predominantly young adults of the age group of 16 - 25 years. Severe pruritus was associated in 86% of patients with CFL, and this symptom preceded the onset of new lesions. Follicular papules were seen more often than pustules in 58% of patients. Staphylococcus aureus was isolated in 72.5%. The lesions were confined to both legs in 50%, extending upto thigh in 28% and in legs, thighs and forearms in 10% of individuals studied.