Engineering Concepts Tutorials

Engineering Concepts Tutorials for UML, Operations Research, Numerical Methods and many more.
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Are You Invisible Online? It's true that your IP address is no secret. It's a basic part of internet communication protocols to send your IP address whenever you connect to another site, request a web page, chat, play an online game, etc. Without your IP address, the computer on the other...
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In the early days of computers, memories were small & expensive. In those days the programmer spent a lot of time trying to squeeze programs into the tiny memory. Often it was necessary to use an algorithm that ran a great deal slower than another, better algorithm simply because the better...
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Cyclomatic Complexity its a type of white box testing for Structural testing use under reference of code complexity. Facts about why White Box Testing? Most programe coding represents what the program actually dose and not what intended to do. It minimizes delay between defect injection...
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What is MD5 or MD5sum? Its a formula - a way to take a message of an arbitrary length, and create a 128-bit "fingerprint" or "message digest" of the message. MD5 is a way to verify data integrity. On these forums, it comes up fairly often in discussions about storing user passwords and other...
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The Web has become the most significant technology of the 21st century. The nature and structure of the Web, as well as the way we use it, have been continuously changing. The Web evolution is huge that we have started to place the evolution—past, current, and anticipated—into different stages as...
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This is known to all that AMD is the only one competitor of Intel’s market. In this “Dual-Core” era of CPU’s AMD is going to launch their APU or Accelerated Processing Unit in this year. Not only AMD Intel is also working with this architecture and hopefully they will also release their new...
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Introduction A VLAN is a grouping of computers that is logically segmented by functions, project teams, or applications without regard to the physical location of users. For example, several end stations might be grouped as a department, such as Engineering or Accounting, having the same...
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Digital certificates are files which are used to prove the authenticity of the user or computer to whom it is issued. It is very similar to an identification proof like passport, driving license or PAN, which gives assurance to the other party that the transaction of information from the...
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In this article, we will learn about the available formats of Digital certificate, their purpose and some of the technical commands used for requesting and issuing the certificates. We shall use OpenSSL, which is an open source toolkit for performing cryptographic operations Common...
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The Bouncy Castle Crypto APIs is a set of implementations of cryptographic concepts and algorithms. Bouncy Castle APIs are developed in both Java and C#. These APIs can be freely downloaded from the Bouncy Castle home page. Let us have a glance at some of the important type of implementations...
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In this article, we will go through a simple example to demonstrate Encryption and Decryption techniques using Triple DES algorithms. We will use Bouncy Castle APIs for performing below steps. Encryption steps - Select an input message - Input message can be in the form of a string which the...
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In the earlier articles, we came across the concepts of RSA algorithm in Public Key cryptography. Being a generic topic, it can be implemented in security applications of variant technologies. We shall see the implementation of RSA algorithm using C#. RSA Encryption RSA Encryption can be...
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Advanced Encryption Standard is a block cipher symmetric encryption algorithm. It is preferred to protect network communications, personal data etc using AES over DES. It encrypts or decrypts the data through several rounds. Categorization It is categorized under three types of key sizes –...
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Public Key Infrastructure Public key infrastructure is an architecture which supports mechanisms like integrity and confidentiality. It is heavily used in e-commerce, where business transactions are frequent and should be much secured. In fact business transaction starts only after the two...
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Cryptography is "Art of writing or hiding secret". It is a science of protecting the information from theft or unauthorized access. To do so, important or confidential information is hided as or converted to some other form of gibberish data. Now original information can be recovered only by the...
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TCP/IP (Transmission Control Protocol/Internet Protocol), the suite of communications protocols used to connect hosts on the Internet. TCP/IP uses several protocols, the two main ones being TCP and IP. TCP/IP is built into the UNIX operating system and is used by the Internet, making it the de...
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Continuation from Denail of Service (DoS) by Pradeep. Have you ever tried to make a telephone call but couldn't because all the telephone circuits were busy? In fact, in India, telephone companies used to air commercials on television and radio that suggested you avoid peak calling times by...
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In mathematical numeral systems, the base or radix is usually the number of various unique digits, including zero, that a positional numeral system uses to represent numbers. For example, the decimal system, the most common system in use today, uses base ten, hence the maximum number a single digit...
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The article continues the discussion on Algorithms available in Symmetric Key cryptography. It explains the whereabouts of DES algorithm. Due to the limitations of DES on security context, we shall include Triple DES in the scope. Triple DES is a stronger form of DES algorithm. Understanding...
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The article extends the Cryptography concepts to explain the Symmetric Key encryption. Additionally, it throws light on the capabilities of Symmetric key encryption and its operational modes. Symmetric-Key encryption Symmetric key cryptography is encrypting or decrypting message using a...
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