Article Introduction：PHP provides encryption and decryption technology to protect sensitive information in web development. Its built-in functions include md5(), sha1() and hash(), which are used to generate irreversible hash values. Third-party libraries (such as PHPseclib, sodium_compat) can also be used to implement higher levels of encryption, such as symmetric and asymmetric encryption. In practice, user passwords should be stored as encrypted hashes rather than clear text to prevent passwords from being exposed in the event of a database breach.

2024-05-02 comment 0  1019

Article Introduction：Usage examples of PHP high-order data structures: array: stores an ordered collection of key-value pairs; list: stores an ordered collection of numeric key data; set: stores a collection of unique values, unordered; heap: a priority queue, elements are sorted by priority; Hash table: A collection of key-value pairs to quickly find key values. Practical case: User database, using arrays to store user data, and processing data through array functions, such as finding John Doe's email address.

2024-05-07 comment 0  855

Article Introduction：MySQL password is SHA-1 encryption method. It is an encryption method based on a hash algorithm, which converts the entered password into a hash value of 40 characters in length. The hash value is unique and irreversible. In MySQL, when user passwords are stored, what is actually stored is a hash value rather than a clear text password. Even if the database is attacked and the password file is leaked, the hacker will not be able to know the user's real password because it cannot be reversed from the hash value. Push out the original password.

2023-07-11 comment 0  4594

Article Introduction：PHP Data Filtering: Effective Handling of Password Encryption and storage of passwords is one of the key protection measures for user accounts, so it is very important that passwords are encrypted and stored. In PHP, there are several methods that can be used to encrypt and store passwords. This article will introduce an effective method to filter and process passwords. First, we need to encrypt the password using an appropriate encryption algorithm. In PHP, one of the most commonly used encryption algorithms is bcrypt. The bcrypt algorithm is a more efficient algorithm than algorithms such as MD5 and SHA-1.

2023-07-29 comment 0  1088

Article Introduction：PHP encryption extension library—Mhash extension library What is Mhash extension library: Mhash is an irreversible PHP encryption extension library based on the principle of discrete mathematics. It is not enabled by default. mhash can be used to create verification values, message digests, message authentication codes, and save key information (such as passwords) without the original text. 1. Mhash extension library installation The installation of the Mhash library is similar to the installation of the Mcrypt extension library. I won’t go into more details here. You can refer to the previous article "PHP Encryption Extension Library—Mcrypt Extension Library...

2017-06-12 comment 0  1740

Article Introduction：PHP encryption extension library—Mhash extension library What is Mhash extension library: Mhash is an irreversible PHP encryption extension library based on the principle of discrete mathematics. It is not enabled by default. mhash can be used to create verification values, message digests, message authentication codes, and save key information (such as passwords) without the original text. 1. Mhash extension library installation The installation of the Mhash library is similar to the installation of the Mcrypt extension library. I won’t go into more details here. You can refer to the previous article "PHP Encryption Extension Library—Mcrypt Extension Library...

2017-06-11 comment 0  1419

Article Introduction：PHP encryption extension library—Mhash extension library What is Mhash extension library: Mhash is an irreversible PHP encryption extension library based on the principle of discrete mathematics. It is not enabled by default. mhash can be used to create verification values, message digests, message authentication codes, and save key information (such as passwords) without the original text. 1. Mhash extension library installation The installation of the Mhash library is similar to the installation of the Mcrypt extension library. I won’t go into more details here. You can refer to the previous article "PHP Encryption Extension Library—Mcrypt Extension Library...

2017-06-12 comment 0  1920

Article Introduction：PHP encryption extension library—Mhash extension library What is Mhash extension library: Mhash is an irreversible PHP encryption extension library based on the principle of discrete mathematics. It is not enabled by default. mhash can be used to create verification values, message digests, message authentication codes, and save key information (such as passwords) without the original text. 1. Mhash extension library installation The installation of the Mhash library is similar to the installation of the Mcrypt extension library. I won’t go into more details here. You can refer to the previous article "PHP Encryption Extension Library—Mcrypt Extension Library...

2017-06-12 comment 0  1238

Article Introduction：PHP has one of the best encryption features for data security. The Hash_hMac() encryption function is one of the most famous ciphers. We'll show you how to use hash_hmac and the sha256 cipher to create a secure signature that you can store in a database or use in your login form. The hash_hmac() function in PHP hash_hmac() creates an alphanumeric keyed secret hash. It utilizes a cryptographic authentication technology called the HMAC method. Syntax: hash_hmac($alGo,$data,$key,$binary=false);$algo is one of the hash_hmac parameters, used for signature secret keying.

2024-02-29 comment 0  734

Article Introduction：Understanding JCA architecture JCA adopts a layered architecture: Service Provider Interface (SPI): defines the interface required for JCA services. Service provider implementation: implements SPI and provides actual services. JCAAPI: API used by developers to access JCA services. Key Concept Key: A binary value used to encrypt or decrypt data. Keystore: A container for storing keys. Password: The password used to protect the keystore. Algorithm: Used to create a fixed-length hash of data. Digital signature: used to verify the integrity and authenticity of a message. JCAAPI Overview JCAAPI provides the following main components: Key generator: used to generate symmetric or asymmetric keys. Key factory: used to create or decrypt keys. Encryptor/Decryptor: Used to encrypt or decrypt data

2024-03-14 comment 0  397

Article Introduction：If you want to use redis key-value storage well in Yii2, a PHP framework, first use composer to install the yii2-redis library, then configure the Connection class in the configuration file of your application, and then add the redis project to the component. .

2019-12-09 comment 0  3275

Article Introduction：What is the Mhash extension library: Mhash is an irreversible PHP encryption extension library based on the principle of discrete mathematics. It is not enabled by default. mhash can be used to create verification values, message digests, message authentication codes, and save key information (such as passwords) without the original text.

2017-05-25 comment 0  3591

Article Introduction：In the process of software development, the storage of key information such as user passwords will inevitably be involved. In most cases, the user's password is stored in the database. If you do not add any confidentiality measures and directly save it in plain text, it will easily cause the leakage of users' personal information, causing unpredictable losses to enterprises and users.

2020-04-28 comment 0  2787

Article Introduction：Overview of data encryption and decryption technology for PHP database connections: With the rapid development of the Internet, databases have become one of the main tools for storing and managing large amounts of data worldwide. However, with the increase of sensitive data in databases, data security becomes more and more important. In PHP applications, we often need to store sensitive data in the database, such as user passwords, credit card information, etc. To ensure the confidentiality of this sensitive data, we can use encryption and decryption technology to protect the security of the data. This article will introduce the PH

2023-09-09 comment 0  1506

Article Introduction：Use of PHP encryption and decryption function library As network security issues become increasingly prominent, encryption has become an indispensable part of modern network technology. In PHP, the encryption and decryption function library provides many encryption and decryption functions, which can be used to process sensitive information and ensure data security. This article will introduce the use of PHP encryption and decryption function library. 1. Commonly used encryption and decryption functions md5 encryption: md5 encryption is an irreversible encryption method that is often used to store passwords and verify the integrity of files. The usage is very simple, for example: $messag

2023-06-16 comment 0  1697

Article Introduction：In PHP language, array is a very important data type used to store key-value pairs. In actual development, we often need to operate on arrays, such as getting key-value pairs, adding or deleting a key-value pair, etc. This article will introduce how to extract key-value pairs from a PHP array. First, we need to understand the data structure of arrays in PHP. An array in PHP is an unordered collection of key-value pairs that can store any type of value. The keys and values ​​in the array can be different types of data, such as strings, integers, floating point numbers, etc. In PHP

2023-04-20 comment 0  873

Article Introduction：The purpose of MySQL foreign keys is to control the data stored in the foreign key table and associate the two tables. It is a very important part of the MySQL database and is worthy of our in-depth understanding. So, what role do MySQL foreign keys play? The following will take you to explore the secrets.

2017-02-10 comment 0  1466

Article Introduction：With the continuous development of Internet applications, the demand for data storage and processing continues to increase. However, traditional relational databases have certain bottlenecks in performance and scalability. In order to solve this problem, NoSQL database came into being. Among them, Redis, as a high-speed NoSQL database, is widely used in fields such as caching, message queues, and key-value storage. This article will introduce in detail how to use PHP to connect to Redis and implement sharded storage to improve read and write performance and scalability. 1. Basic knowledge of Redis Redi

2023-05-16 comment 0  756

Article Introduction：Verify that the hashed password matches the original password using the PHP function "password_verify" Password hashing is a cryptographic technique that converts the original password into an irreversible hash value. This is a common method of storing passwords because it provides extra security. When a user enters a password upon login, we need to compare the entered password with the hashed password stored in the database to verify the user's identity. In order to achieve this function, we can use the PHP function "password_ver

2023-07-24 comment 0  1237

Article Introduction：The reasons why localstorage is unsafe are unencrypted data, XSS attacks, CERF attacks, capacity limitations, etc. Detailed introduction: 1. Data is not encrypted. Localstorage is a simple key-value pair storage system. It stores data in the user's browser in clear text, which means that anyone can easily access and read the data stored in localstorage. If sensitive information is stored in localstorage, hackers or malicious users can easily obtain this information and so on.

2023-10-10 comment 0  1510