Tech and Education

Cryptography is the practice of secure communication in the presence of third parties. It is a technique of converting data into a secret code so that only the intended recipients can read it. Cryptography has been used for thousands of years to protect information, starting with ancient civilizations who used simple ciphers to encode messages. In modern cryptography, complex algorithms are used to create codes and keys that are nearly impossible for unauthorized users to break. These algorithms are based on mathematical principles and are designed to ensure the confidentiality, integrity, and authenticity of data. There are two main types of cryptography: symmetric and asymmetric. In symmetric cryptography, the same secret key is used to encrypt and decrypt the message. The sender and receiver of the message must have the same key. This type of cryptography is faster than asymmetric cryptography and is commonly used to encrypt large amounts of data. In asymmetric cryptography, two dif...

Guys, You must have heard the words NFT or Blockchain recently. That is, Jack Dorsey is selling his first tweet, a lot of people are selling digital art paintings. These are being sold through NFTs. Here, I'm talking about the NFT, not NEFT that is used in banking transactions. Because NFT has emerged as an important word in the realm of technology.  It is quite unique but still not many people know about this. So, let's dive deep into the NFT or the Non Fungible Tokens. And if you enjoy reading this article then do share it with others. You might feel odd to talk about NFT, but if you look at Blockchain implementation of which was Cryptocurrency or Bitcoin, just like that NFT is it's second implementation. And the profit of this implementation is you can sell unique, expensive, valuable, rare and one of a kind things.  What's the meaning of one of a kind? Its pretty simple, there's only one piece of a certain thing existing in the world. It means, the value of a ...

  What is TypeScript? TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. It is pure object-oriented with classes, interfaces and statically typed programming languages like C# or Java . You will need a compile and generate the code in the JavaScript file. Basically, TypeScript is the ES6 version of JavaScript with some additional features. Why do we use TypeScript? Using new features of ECMAScript Static Typing Type Inference Better IDE Support Strict Null Checking Interoperability Features of TypeScript Cross-Platform Static-Type Manipulation DOM Manipulation Object-Oriented Language Optional Static Typing ES6 Features Benefits of TypeScript Fast, simple, easy to learn and runs on any browser or JavaScript engine It is similar to JavaScript and uses the same syntax and semantics This helps backend developers write front-end code faster You can call the TypeScript code from an existing JavaScript code The Definition file, with .d.ts extension, pro...

What is Cryptography ? Cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages . Various aspects of information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography. Prior to the modern age, cryptography was effectively synonymous with encryption , the conversion of information from a readable state to apparent nonsense. Modern cryptography is heavily based on mathematical theory and computer science. Cryptographic algorithms are designed around computational hardness assumptions, making the algorithms hard for adversaries to break. There exist information-theoretically secure schemes that probably cannot be broken even with unlimited computing power.   Cryptography also plays a major role in digital rights management and copyright infringement of digital media. Caesar Cipher The Caesar Cipher is one of the earliest known and simplest...

Plain text - a clear text message. Encryption - the process of turning a clear-text message (plaintext) into a data stream which looks like a meaningless and random sequence of bits (ciphertext). Decryption - the process of getting plaintext from encrypted data. Cipher - a cryptographic algorithm that uses a mathematical functions which takes plaintext as the input and produces ciphertext as the output and vice versa. Key - a  cryptographic key is a string of bits used by a cryptographic algorithm to transform plain text into cipher text or vice versa. Stream ciphers - symmetric algorithms that operate on 1 bit (or sometimes 1 byte) of plaintext at a time. Block ciphers - algorithms that operate on blocks of bits at a time. Symmetric algorithms - algorithms that we the same key for encryption and decryption. Public-Key (Asymmetric) algorithms - algorithms that use two different keys (public and private) for encryption and decryption. ! The first use of the term cryptograp...

A cryptocurrency is a digital or virtual currency that is meant to be a medium of exchange. Some other features of cryptocurrency: There's a limit to how many units can exist Easily verify the transfer of funds Operating independent of a bank Allows new units to be added only after certain conditions are met What makes Cryptocurrencies special ? Little to no transaction costs 24/7 access to money No limits on purchase and withdrawals Freedom for anyone to use International transactions are faster What's the Cryptography ? Cryptography is a method of using encryption and decryption to secure communication in the presence of third parties with ill intent Cryptography usually requires a computational algorithm (like SHA256), a public key (that the users shares with everyone) and a private key (which acts like a digital signature of the user) A normal bitcoin transaction: Transaction details ➡ SHA256  ➡ Passed through a signature algorithm with the user's private key  ➡ Digital...

  What Will You Learn ? Develop in depth understanding of the key technologies in data science and business analytics: data mining, machine learning, visualization techniques, predictive modeling, and statistics Practice problem analysis and decision-making Gain practical, hands-on experience with statistics programming languages and big data tools through coursework Employ cutting edge tools and technologies to analyze Big Data Apply algorithms to build machine intelligence Who is the target audience? Anybody with an interest in Data Science Anybody who wants to improve their data mining skills Anybody who wants to improve their statistical modelling skills Anybody who wants to improve their data preparation skills Anybody who wants to improve their Data Science presentation skills Benefits This course will give you a full overview of the Data Science journey. Upon completing this course you will know: How to clean and Prepare your data for analysis How to perform basis visualisat...