🔐What is Encryption & How It Works?

How Software Engineer Protect Sensitive Data

Developers use encryption to protect sensitive information such as user account info, credit card numbers and customer data etc.

Encryption is simply the process of transforming readable data into an unreadable format. Once the data has been encrypted, only those who have access to the right key can decrypt it and view its contents.

🚨 Why is encryption necessary to protect your data? Quite simply, without encryption your data is sitting ducks waiting to be stolen or hacked.

How Encryption Works

You might not realize it, but encryption is used everywhere, from texting to using an ATM to shopping online.

For Example, Caesar cipher, also known as Caesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, D would be replaced by A, E would become B, and so on. The method is named after Julius Caesar, who used it in his private correspondence. [Source Wikipedia]

When encrypting, a person looks up each letter of the message in the "plain" line and writes down the corresponding letter in the "cipher" line.

Plaintext:  THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
Ciphertext: QEB NRFZH YOLTK CLU GRJMP LSBO QEB IXWV ALD

Why Developer Use Encryption

Today's encryption principles are fundamentally the same, only more sophisticated. Now a days computer identify the most old encryption within seconds for example our above Caesar’s Cipher text message. To overcome these issue Cryptographers use more sophisticated encryption and secret keys.

More Bit Encryption

256-bit encryption is now the industry standard. So, rather than a range of 1-25 (the letters of the alphabet), it is a range of 2 ^256.That is very difficult to handle by today computer.

Private Public Keys

Developer use a public key and a private key to encrypt and decrypt data. The public key is freely shared and is used to encrypt messages. The private key is kept confidential and is used to decrypt messages encrypted with the public key. The message can only be decrypted by someone who has access to the private key.

Caesar Cipher Implementation C# Example

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
namespace Caesar_Cipher { 
    class Program {  
        public static char cipher(char ch, int key) { 
            if (!char.IsLetter(ch)) {  
                return ch;  
            }  
            char d = char.IsUpper(ch) ? 'A' : 'a';
            return (char)((((ch + key) - d) % 26) + d);  
        }  
        public static string Encipher(string input, int key) { 
            string output = string.Empty;  
            foreach(char ch in input)  
            output += cipher(ch, key);  
            return output;  
        }  

        public static string Decipher(string input, int key) {  
            return Encipher(input, 26 - key);  
        }  
        static void Main(string[] args) {  
            Console.WriteLine("Type a string to encrypt:");  
            string UserString = Console.ReadLine(); 
            Console.WriteLine("\n");  
            Console.Write("Enter your Key");  
            int key = Convert.ToInt32(Console.ReadLine());  
            Console.WriteLine("\n");  
            Console.WriteLine("Encrypted Data");  
            string cipherText = Encipher(UserString, key);  
            Console.WriteLine(cipherText);  
            Console.Write("\n");  
            Console.WriteLine("Decrypted Data:");  
            string t = Decipher(cipherText, key);  
            Console.WriteLine(t);  
            Console.Write("\n");  
            Console.ReadKey();  
        }  
    }  
}    

Privacy And Encryption

In this age of digital technology, privacy and encryption are essential for keeping your data secure.

Every day, we share personal information online – from our addresses and phone numbers to the sensitive (our deepest thoughts and secrets). It's essential that we protect this information, both for our own safety and for the sake of privacy.

🚀 Digital surveillance is on the rise, and it's becoming easier and easier for companies and governments to track our every move. Websites track our browsing history, social media platforms keep track of our likes and posts, and even our smartphones collect data about our activity. This data can be used to track our movements, our interests, and even our thoughts.

Encryption is one of the best ways to protect your personal information. Encryption technology scrambles your data so that it can't be read by anyone other than you or someone you specifically allow access to your encrypted files. This helps to protect your privacy by keeping your data safe from digital surveillance.

It's important to remember that encryption isn't magic – it won't protect you if someone else has access to your personal information.

By raising awareness about the importance of privacy, we can help ensure that everyone has rightful rights to their personal information. Let's work together to make sure that privacy remains a priority in today's society!

🚦 Nowadays, privacy is essential. Customers want to know that their data is secure, and businesses want to avoid the financial and reputational harm that data breaches can cause.

Hi, I’m Wajid Khan. I am trying to explain computer stuff in a simple and engaging manner, so that even non-techies can easily understand, and delivered to your inbox weekly.

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