Securing cloud computing environment by mitigating DDoS attacks: Moving target defence approach

Cloud computing with its recent development, made it’s accessible by almost everyone. Millions and millions of people daily store their data in the cloud platform and utilize for various kind of need. 

In this scenario, distributed denial of service (DDoS) attacks is one of the common issues in the day-to-day usage, which severally affects the availability of the resources or services. The challenge is to create a DDoS detection and mitigation system that can protect against both volumetric and application-specific resource starvation and exhaustion attacks. In this paper, a new method named MOTAG has been proposed. This method of moving-target defence to overcome DDoS attacks will repeatedly shuffle the assignments between client to server in order to identify the malicious clients first and then to quarantine them.

Rapid synthesis, characterization, and studies of hydroxyapatite nanoparticles

Seventy percent of bone is made up of the mineral hydroxyapatite, which is (HAp) [Ca₁₀ (PO₄)₆ (OH)₂] an inorganic compound. The crystal size of HAp in natural bone is in nano-range. The fundamental elements of hydroxyapatite are primarily calcium and phosphorus, with a stoichiometries calcium and phosphate ratio of 1.667. Hydroxide ions are eliminated at elevated temperatures in this chemical synthesis method.

Although numerous approaches investigated ways of making these nanocrystals, controlling the size, shape and crystallinity and many parameters affect the size and shapeof such materials and this still needs further research. Synthetic ceramic based on calcium phosphates particularly in the composition of tricalcium phosphate and hydroxyapatite has extensively been studied and clinically used. The biomaterials research field focuses on the synthesis of these materials for three decades to applications in orthopedics and dentistry.

Hypertension Episodes of Adrenal Cortical Oncocytoma Mimicking Pheochromocytoma Attacks

Catecholamine-secreting tumors which are derived from chromaffin cells in adrenal medulla are called pheochromocytoma. The ratio of pheochromocytoma in all hypertensive patients is less than 0.2%. Adrenal oncocytomas can mimic the clinical features of pheochromocytoma. We aimed to present the findings of 2 patients with adrenocortical oncocytoma resembling pheochromocytoma.