Cyber Security

  What is Privacy P rivacy is a need all of us have to have. But in the modern world, people do not care about their privacy when they using the internet and behaving. But most people do not have any idea about what is privacy and why we need privacy for our life. T hese days  it becomes a world-famous topic because of the modification of the Whatsapp privacy policy.  W e can define privacy as " the secureness of our private and sensitive information only with us by not allowing others to know, expose, observe, or reveal our secret and private things and stay free with public attention ". Privacy over the communication W hen we use the internet or tools connect with the internet we should pay more attention to the importance of privacy. Because the internet spread throughout the world, and if we lose our privacy by accidentally exposing something we do not want to expose, then it can affect our whole life and we have to face lots of embarrassing situations by others knowing o

D uring the renaissance period, most of the cryptographic methods and new cryptographic concepts are invented by different people and it made a new chapter in cryptography. At that time these methods are good enough to protect secret messages, but after one or two decades these methods became unsafe. Because some cryptanalysts successfully found a way to break these methods. Although they broke these methods, the concept of these methods never vanished and these concepts were improved through new inventions. During the time period of World War, I and World War II the significance of cryptographic methods became very high. Because both parties want to grab the secret messages which were communicated between military high-rankers and the war field. So at that time, both parties pay more attention to invent more powerful cryptographic methods. Ultimately as a result of these conditions more powerful and more reliable cryptographic methods were invented which were difficult to break .  And