Cryptography | Key | Encryption | Decryption | AES | #cipher #cryptography #cybersecurity #algorithm

Cryptography is the practice of using mathematical algorithms and protocols to secure communication and protect information from unauthorized access. Cryptography involves transforming plaintext (readable information) into ciphertext (encrypted information) through the use of encryption algorithms and a secret key. The encrypted information can only be decrypted and restored to its original form by someone who has access to the secret key. Cryptography has a long history and has been used for centuries to secure communication and protect sensitive information. In the modern digital age, cryptography is used to secure a wide range of applications, including secure online transactions, email communication, cloud storage, and more. There are two main types of cryptography: symmetric-key cryptography and public-key cryptography. In symmetric-key cryptography, the same secret key is used for both encryption and decryption. In public-key cryptography, each user has two keys: a public key used for encryption and a private key used for decryption. Cryptography plays a crucial role in maintaining the confidentiality, integrity, and availability of information in today's digital world. There are several types of cryptography, including: Symmetric-key cryptography: In this type of cryptography, the same secret key is used for both encryption and decryption. Examples of symmetric-key algorithms include AES (Advanced Encryption Standard), DES (Data Encryption Standard), and Blowfish. Public-key cryptography: In this type of cryptography, each user has two keys: a public key used for encryption and a private key used for decryption. Examples of public-key algorithms include RSA (Rivest-Shamir-Adleman), Elliptic Curve Cryptography (ECC), and Diffie-Hellman. Hash functions: Hash functions are a type of cryptography used to generate a unique fixed-size representation of a message called a message digest. Hash functions are often used in digital signatures and data integrity checks. Examples of hash functions include SHA (Secure Hash Algorithm) and MD5 (Message Digest 5). Stream cipher: A stream cipher encrypts data one bit or byte at a time and is used to encrypt real-time data, such as audio and video streams. Block cipher: A block cipher encrypts data in fixed-size blocks and is used to encrypt larger amounts of data, such as files and messages. Substitution cipher: A substitution cipher replaces each letter of the plaintext with a corresponding letter or symbol. Transposition cipher: A transposition cipher rearranges the order of the letters in the plaintext. Cryptography plays a crucial role in maintaining the confidentiality, integrity, and availability of information in today's digital world, and the various types of cryptography are used for different purposes and in different applications. Credit to the author Brian Will. #cryptography #quantumcryptography #cryptography_and_security #cryptographyresearch #cryptography101 #publickeycryptography #cybersecurity #cybersecurityawareness #cybersecurityexpert #cybersecurityengineer #cybersecurityexperts #cybersecuritythreats #cybersecurityanalyst #instacybersecurity #cybersecuritystartup #cybersecurityprofessional #cybersecurityteam #towardscybersecurity #learncybersecurity #cybersecurityprofessionals #blackcybersecurity #cryptography #quantumcryptography #cryptography_and_security #cryptographyresearch #cryptography101 #publickeycryptography