What are the encryption technologies in PHP7.0?

With the continuous development of the information age, network security issues have attracted more and more attention. For website developers, ensuring the security of user information is a task that they must pay attention to. In website applications, encryption technology is a very important means of protection. As a widely used programming language, what are the encryption technologies in PHP version 7.0? A detailed introduction will be given below.

1. SSL/TLS encryption

SSL/TLS is the most widely used security protocol on the Internet. It can provide confidentiality, integrity and credibility for data transmission. It is a Very reliable network protocol. In PHP7.0, by using the openssl extension library, we can easily integrate the SSL/TLS encryption module to ensure the safe operation of the website.

2. Hash Algorithm Encryption

The hash algorithm is a relatively commonly used encryption algorithm. It maps data of any length to data of a fixed length, and the hash value can only be obtained from The original data is calculated and cannot be calculated in reverse. In PHP7.0, we can use the functions provided by the hash extension library, such as hash(), hash_hmac() and hash_file(), to hash encryption of data. It also supports multiple hash algorithms, such as MD5 and SHA. -1, SHA-256, etc.

3. Symmetric encryption

Symmetric encryption is an encryption algorithm. Its encryption key is the same as the decryption key. The same key is used for encryption and decryption, so its security has certain limitations. sex. In PHP7.0, we can use the functions provided by the mcrypt extension library to implement symmetric encryption, such as mcrypt_encrypt() and mcrypt_decrypt(). It also supports multiple symmetric encryption algorithms, such as AES, DES, etc.

4. Asymmetric encryption

Asymmetric encryption is an encryption algorithm. Its encryption key and decryption key are different. Different keys are used for encryption and decryption, so its security is relatively higher. powerful. In PHP7.0, we can use the functions provided by the openssl extension library to implement asymmetric encryption, such as openssl_public_encrypt and openssl_private_decrypt functions. It also supports multiple asymmetric encryption algorithms, such as RSA, DSA, etc.

5. Password hash function

The password hash function is an encryption algorithm that maps plaintext passwords into fixed-length hash codes. At the same time, the function is irreversible to ensure Password security. In PHP7.0, we can use the password_hash() and password_verify() functions to implement password hash function encryption. The password_hash() function is used to generate the password hash code, and the password_verify() function is used to verify whether the password matches the hash code. Column code matching.

Summary

There are many types of encryption technologies in PHP7.0. The encryption methods provided include symmetric encryption, asymmetric encryption, hash algorithm encryption, and password hash functions. , these technologies can ensure the safe operation of the website and the user's information security, and are essential skills for website developers. In the future, with the continuous development of network technology, encryption technology will also develop more and more, and the PHP language will continue to introduce new ones to provide more efficient and secure technical applications.

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