PHP security protection: strengthen password protection

With the rapid development of the Internet, more and more people are beginning to store sensitive information such as personal information and financial data in the cloud or on various websites, which has also led to network security issues becoming more and more prominent. Therefore, in order to protect the security and personal privacy of users of various websites, website developers need to pay attention to strengthening password protection.

As one of the most popular web programming languages, the security of PHP has also attracted much attention. Developers need to understand how to strengthen password protection to make users more secure when using the website.

1. Use strong passwords

Using strong passwords is the basis. A strong password refers to a password that consists of uppercase letters, lowercase letters, numbers and symbols. Developers need to add password strength detection rules when users register. Weak passwords are not allowed to pass. They also need to announce strong password rules to users to improve users' security awareness.

2. Add salt

Adding salt can effectively prevent password brute force cracking. To put it simply, salting is to add a string after the password. This string is related to the user account. Once salted, it will become a new password. At the same time, the salted string is stored on the server. end, avoiding malicious acquisition by normal people.

3. Encrypted storage

Before storing the user password in the database, the plaintext password needs to be encrypted. The currently more commonly used encryption algorithm is MD5 (an irreversible encryption algorithm) . However, as computer computing power increases, the MD5 algorithm also faces the risk of being cracked. In this case, a certain salting strategy can be used, and more advanced encryption algorithms such as SHA256 can also be used.

4. Set a limit on the number of logins

In order to prevent brute force cracking, a limit on the number of logins should be set. After each wrong login attempt, there will be a delay of a period of time. After the number of wrong attempts exceeds the specified number, the system will automatically Lock accounts and send relevant messages to users.

5. SSL Certificate Encryption

The SSL certificate is a digital certificate that can establish a secure channel between the browser and the server. PHP developers should use SSL encryption for their websites, which can protect users’ landing pages and sensitive data such as user information.

PHP is a powerful web application development language. When using it for website development, developers need to continuously improve their awareness of password protection and adopt some practical security strategies to improve the overall security of the system. While comprehensively using the above strategies for password protection, corresponding strategies should be formulated according to the situation of the website to carry out targeted protection, thus greatly improving the overall security of the PHP system.

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