Correct English representation of cryptography

The correct English expression of cryptography is "cryptography".

Cryptography is a subject that studies information security issues such as data confidentiality, data integrity, identity authentication and prevention of counterfeiting attacks. It mainly includes encryption technology, decryption technology and key management. Cryptography is divided into two stages: traditional cryptography and modern cryptography.

Traditional cryptography is a widely used encryption method in military, political and diplomatic activities. Its basic idea is to transform plaintext into complex ciphertext through transformation or permutation, thus ensuring the confidentiality and security of communication. Commonly used traditional encryption methods include Caesar password, transposition password, replacement password and so on.

Modern cryptography is a mathematical basic encryption technology, which is mainly divided into symmetric encryption and asymmetric encryption. Commonly used algorithms are DES, AES, RSA and ECC. Symmetric encryption means that plaintext and ciphertext use the same key for encryption and decryption. The algorithm is efficient, but the key management is difficult. Asymmetric encryption makes up for the key management problem of symmetric encryption, and ensures the confidentiality of communication and the security of identity authentication through the combination of public key and private key.

Cryptography is widely used, which can be used in e-mail, online payment, virtual private network, electronic bills and other fields. At the same time, due to the expanding power of password technology, people pay more and more attention to password management, strengthen security management, and ensure that their information is not leaked and spread.

Cryptography is a very important subject, which is not only widely used in information technology, e-commerce and other industries, but also plays an important role in politics, military, finance and other fields.

Other fields of cryptography

The promotion of cryptography also includes a wider range of fields, such as the impact of cryptography on big data, blockchain, artificial intelligence and the Internet of Things. Cryptography has played a great role in different fields, and has been expanding and evolving with the development of technology.