This paper describes the study of cryptographic hash functions, one of the most important classes of primitives used in recent techniques in cryptography. The main aim is the development of recent crypt analysis hash function. We present different approaches to defining security properties more formally and present basic attack on hash function. The Main aim of this paper is the development of ...

Scheele and Priestly discovered oxygen independently of each other in 1772 and 1774, respectively. It was quickly realized that this gas is not only life-giving but might be poisonous as well. However, what man has known for only 2 centuries nature itself has known for some 700 million years. One of the biggest leaps forward in evolution occurred when blue–green-like algae developed enzymes tha...

The purpose of this study was to determine the extent to which marijuana, as currently used by the population studied, is an actual hallucinogen rather than an intoxicant or stimulant. There is evidence that marijuana is a potential hallucinogen. Lewin (I) introduced the classification "phantastica" to pharmacology as including drugs capable of evoking unusual sensory experiences and thought pa...