Cryptography
Cryptography is the practice of secure communication, used to protect information from unauthorized access, alteration, or destruction. It involves the use of mathematical algorithms, or “ciphers,” to transform plaintext into ciphertext, and back again. The goal of cryptography is to ensure the confidentiality, integrity, and authenticity of information as it is transmitted or stored.
Cryptography is the practice of secure communication, used to protect information from unauthorized access, alteration, or destruction. It involves the use of mathematical algorithms, or “ciphers,” to transform plaintext into ciphertext, and back again. The goal of cryptography is to ensure the confidentiality, integrity, and authenticity of information as it is transmitted or stored.
Cryptography can be divided into two main categories: symmetric cryptography, where the same key is used for encryption and decryption, and asymmetric cryptography, also known as public-key cryptography, where a different key is used for encryption and decryption.
Cryptographic techniques are used in a variety of applications, including secure communication over the internet, electronic commerce, secure storage of sensitive information, and digital signatures. Common cryptographic algorithms include AES, RSA, and SHA-256.
Cryptography is a constantly evolving field, as new technologies and attack methods emerge. It is important to choose cryptographic algorithms and protocols that are well-vetted and widely used, and to implement cryptography in a secure manner, to ensure that the confidentiality, integrity, and authenticity of information are maintained. However, even well-implemented cryptography can be vulnerable to attacks, such as brute-force attacks, side-channel attacks, and quantum computing attacks, so it is important to stay up-to-date with the latest developments in cryptography and to use cryptographic techniques judiciously.
