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LANGUAGE PROCESSORS

Why do we need a language processor LANGUAGE PROCESSORS activities arise due to the differences between the manner in which a software designer describes the ideas concerning the behavior of software and the manner in which these ideas are implemented in a computer system.  The designer expresses the ideas in terms related to the application

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HMAC

WHAT IS HMAC? The full form of HMAC IS Hash Based Message Authentication Code. HMAC = H (K Ꚛ OPAD, H (K Ꚛ IPOD, MESSAGE m)) Where HMAC = final output K = secret key Ꚛ = XOR Operation M = input message m OPAD & IPOD = fixed & different 64 byte string repeated

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Authentication Function

MESSAGE AUTHENTICATION

DEFINITION MESSAGE AUTHENTICATION is provide by the secret keys that is done in case of encryption. MESSAGE AUTHENTICATION is concerned with  ► Protecting integrity of message ► Validating identity of originator ► Non-repudiation of origin. FUNCTIONS OF MESSAGE AUTHENTICATION. There are three functions. DEFINE 1. HASH FUNCTION A feature that maps a message of any size into a constant length hash value,

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KERBEROS.

◉ INTRODUCTION: In this article, I will give SHORT NOTE ON KERBEROS. ▶ It is a trusted key system from MIT. ▶ It provides centralized private key, third-party authentication in a distributed network. ◎ KERBORES requirements are as follow: Secure Reliable Transparent Scalable It is implemented using an authentication protocol based on Needham – Schroeder.

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FIVE NUMBER SUMMARY: EXAMPLE

WHAT IS FIVE NUMBER SUMMARY? The FIVE NUMBER SUMMARY consists of five values, from that five values it provides the information from the data set. FIVE NUMBER SUMMARY: EXAMPLE is an example. The Five Values in Five Number Summary: MEAN MEDIAN MAX Q1 Q2 I have explained all these Five Values in a previous article for FIVE

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APPLICATION OF SUPERCONDUCTORS

Magnetic Levitation (Maglev) Magnetic levitation or maglev is the process by which an object is suspended above another object with no other support but magnetic fields. We know that a diamagnetic substance repels a magnetic field. Thus, the perfect diamagnetic property of superconductors make them suitable for achieving frictionless motion in motors and bearing The

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Relays a Circuit Protection Device.

INTRODUCTION The device that automatic senses the fault condition and closes contacts known as relay. In above article we learned about ELCB and MCB . Now we will learn about Relays a Circuit Protection Device. Their are three types of relays such as: Electromagnetic Relays Induction Type Relay Thermal Relays 1. Electromagnetic Relays (Relays a

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