what is cryptography in hindi || history of cryptography in hindi

#teckiajay #ajaybudaniya !!! what is cryptography in hindi || history of cryptography in hindi !!! Video Link - https://youtu.be/gFb2oI0PRX8 What is Cryptography - Cryptography is a method of protecting information and communications through the use of codes, so that only those for whom the information is intended can read and process it. History of Cryptography - The history of cryptography dates back thousands of years, with evidence of its use found in ancient civilizations such as Egypt and Mesopotamia. Here are some key milestones in the development of cryptography: Ancient Cryptography: One of the earliest known examples of cryptography is found in the hieroglyphs used in ancient Egypt, which often used symbols and codes to communicate secret messages. The ancient Greeks also used a simple form of cryptography known as the "scytale," which involved wrapping a message around a rod to create a transposition cipher. The Caesar Cipher: The Caesar Cipher, named after Julius Caesar, is one of the earliest known examples of substitution ciphers, which involves replacing letters with other letters or symbols. It involves shifting each letter of the alphabet by a fixed number of positions. This simple encryption method was used by Caesar to communicate secret messages with his generals. Middle Ages: During the Middle Ages, cryptography was used primarily for military and diplomatic purposes. Codes and ciphers were developed by governments and armies to secure communications and protect sensitive information. One of the most famous examples is the Vigenère cipher, developed by Blaise de Vigenère in the 16th century, which is a polyalphabetic cipher that uses multiple alphabets. World War II: Cryptography played a pivotal role in World War II, with both the Axis and Allied powers developing sophisticated cipher systems to encrypt their communications. The German Enigma machine, which used a series of rotors to encrypt messages, was eventually cracked by the Allies through the work of codebreakers at Bletchley Park, including Alan Turing. Modern Cryptography: With the advent of computers and the internet, cryptography has become more important than ever for securing digital communications and protecting sensitive information. New cryptographic algorithms and protocols have been developed, including public-key cryptography, which uses a pair of keys for encryption and decryption, and hash functions, which generate fixed-length digests of data. Today, cryptography is used in a wide range of applications, from securing online banking transactions to protecting government secrets. Its development and evolution over thousands of years have played a crucial role in shaping the modern world. Why Need Cryptography - Cryptography is necessary because it provides a means of securing information in a way that it can only be accessed by authorized individuals or entities. Here are some of the reasons why cryptography is essential: Confidentiality: Cryptography ensures that sensitive information remains private and is not accessible to unauthorized individuals. It does this by encrypting the data, making it unreadable to anyone who does not have the key to decrypt it. Integrity: Cryptography provides a mechanism to verify that the information has not been tampered with or altered during transmission. This is done by using a hash function to generate a digital fingerprint of the data, which can then be compared to the original fingerprint to ensure that the data has not been modified. Authentication: Cryptography allows individuals and entities to verify each other's identity, ensuring that only authorized parties can access the information. This is done through the use of digital signatures and public-key encryption. Non-repudiation: Cryptography provides a way to ensure that a sender cannot deny having sent a message or document. This is done through the use of digital signatures, which provide a way to verify the authenticity of the sender. In summary, cryptography is necessary because it provides a way to secure information and communications, ensuring confidentiality, integrity, authentication, and non-repudiation. Instagram - https://www.instagram.com/teckiajay/ Discord Server - https://discord.gg/bTkEY9EbtX Telegram channel - https://t.me/tecki_ajay Thanks For Watching ! keep It up !