using md5

Vrrp introduction vro redundancy protocol (VRRP) is a selection protocol that dynamically allocates the responsibility of a vro to one of the VRRP routers on the LAN. The VRRP router that controls the IP address of a vro is called the primary router.

A router is an important bridge between a LAN and an external network. It is an indispensable part of the network system and a leading edge in network security. However, vro maintenance is rarely valued. Imagine that if a vro does not guarantee its

1. mathematical function ABS (x) returns the absolute value BIN (x) of x and returns the binary value of x (OCT returns octal, HEX returns hexadecimal) CEILING (x) returns the x power FLOOR (x) of the smallest integer value EXP (x) returned value e (

RSA encryption algorithm is an asymmetric encryption algorithm. RSA is widely used in public key cryptography standards and in electronic commerce. RSA was introduced in 1977 by Ronald Leevist (Ron rivest), Adi Samor (Adi Shamir) and Lennard Adman

For more answers please refer to how to effectively prevent XSS attacks/ajax cross-domain attacksLet me say some common ways to prevent illegal users.1 Front-end JS authentication: I think that JS authentication is just a kind of user experience

One is that the input data is not filtered (the input is filtered), and the other is that the data sent to the database is not escaped (Escape output ). These two important steps are indispensable and need special attention at the same time to

1 php Weak typePHP is a weakly typed language, so variables are automatically type-converted because they use different scenarios. Use = = in PHP as well ! = when the equality is judged, the type conversion is done automatically, with the = = = and !

Spring Boot static resource processing By default, Spring Boot provides static resource processing, using various attributes configured in WebMvcAutoConfiguration. We recommend that you use the default configuration method of Spring Boot. If you

For web programming, security is an issue to be aware of at all times. In the case of tapping the beef brisket to prevent SQL injection, MD5 conversion of plaintext password for dark text and other operations are to address the Web programming

This article mainly introduces how to use CDN to cache images generated by PHP files. The PHP image generated here means that the src address is an image of a PHP file. If CDN is not used, the pressure on the server will be very high. This article

CCNP comprehensive experiment- The top labs are as follows:   650) this. width = 650; "alt =" "border =" 0 "src =" http://img1.51cto.com/attachment/201104/185551130.jpg "/>Lab requirements: 1: R3, R4 for NAT, R3 E0/1 for export, and R4 E0/0 for

In fact the principle is very simple, you say automatically generate URL that step does not, first URL is divided into two parts:The first part is a verification address with a parameter that identifies the user ID, for example:

First download Phpmailer, directly in Baidu Search, and then download just fine.Then register a Sina mailbox as the sender's mailbox. QQ and 163 mailbox are not stable, and sometimes mail can not be sent out.Unzip the downloaded file (if it is a

Provides a variety of official and user-released code examples. For code reference, you are welcome to exchange and learn this article uses Ajax to skip New logon and exit, thus improving the user experience. Refreshing LogonDemo:

PHP Programming Security Guide1. General1) Lamp system security Settings2) php.ini Security settings3) using the MVC framework2. Data transmission1) in $_get $_post,$_cookie, and $_request, before disinfection and validation, programmatically

Of course, we use cookies: User IDs are stored in cookies, and the server uses the IDs in cookies to find the database and obtain the desired user information. CurrentUser, that is, the current user, is a concept that is widely used in our

Php custom encryption solution implementation code. The Mcrypt encryption library in PHP requires additional settings. many people directly use the md5 () function for encryption. this method is indeed safe, but because md5 is irreversible

Data on servers and databases is occasionally stolen. Therefore, it is necessary to ensure that important user data, such as passwords, cannot be obtained by others. Here we will discuss the principles of Hash and how it protects the password

The security environment discussed in this article is in linux+apache+mysql+php. Security issues beyond this range are not within the scope of this article One, Apache server security settings 1, to nobody users to run In general, Apache is

Mysql horizontal segmentation bitsCN.com In large and medium-sized projects, mysql horizontal segmentation usually splits the database or data table horizontally to reduce the pressure on a single database or table, considering the maximum data size