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The recent testing process has encountered a case of system AES and FEC, here is a brief introduction to their principles and applications in the Gpon system.Aesfor the gpon system, the downlink data is sent by broadcast to all ONU, involving a

Copy CodeThe code is as follows: /* * How to prevent duplicate submission of forms in PHP */ Session_Start (); if (Empty ($_session[' IP '))) {//First write operation to determine if the IP address is logged to know whether to write to the database

Session_Start ();//number of random codes//$_rnd_code = 4;//Create random code for ($i =0; $i The output result is Reply to discussion (solution) $_nmsg= ";for ($i =0; $i $_nmsg.=dechex (Mt_rand (0,15));} $_nmsg= ";for ($i =0; $i

PHP prevents forms from repeating the method analysis by recording IP, IP form In this paper, we analyze how PHP can prevent form recurrence by recording IP. Share to everyone for your reference. The specific analysis is as follows: The simple

Deployment requirements: (1) CentOS 73 separated from two hosts, one deployed httpd and PHP, the other deployed mariadb;(2) Deploy two virtual hosts, one provides WordPress, one provides phpmyadmin;(3) Provide HTTPS virtual host for

This is a recent look at SSL and HTTPS summary of a simple, and most of the content is the reference network content, self-summed up the next.SSL IntroductionHTTPS describes the HTTP request data workflow:Users enter URLs in the browser and tell the

Preface Horse will be recruited, so I intend to put a resume on their own web page, but do not want to give in addition to the recruitment of people, or I designated people outside, so I need to encrypt the page page I looked for a lot

1. First understand asymmetric encryption and symmetric encryption(1) An asymmetric encryption algorithm requires two keys: Public key (PublicKey) and private key (Privatekey). The public key is a pair with the private key, and if the data is

The example of this paper is to analyze the way that PHP prevents form recurrence by recording IP. Share to everyone for your reference. The specific analysis is as follows: This principle is relatively simple is the first time the user submitted

This article describes how to prevent repeated submission of forms by recording IP addresses in php. It compares and analyzes how to prevent repeated submission by recording IP addresses and how to prevent repeated submission through databases, it

Implementation of dynamic random verification code mechanism in PHPThe Verification Code (CAPTCHA) is the abbreviation for "Completely Automated public Turing test to tell Computers and humans Apart" (fully automated computer-and human-Turing test),

This principle is relatively simple. when the user submits the request for the first time, we record the IP address of the user. if the user submits the form again within a fixed period of time, the system will prompt repeated submission, this

After a basic tutorial on the Web site, there is some understanding of PHP syntax.Start doing some small projects to practiced hand:1.1: Generate Random stringMake a page with a text edit box and a button, enter a number in the edit box, click the

Deployment of Lamp based on the php module: (1) CentOS 7 is separated from two hosts, one is httpd and php, and the other is mariadb; (2) deploy two virtual hosts: wordpress and phpMyAdmin; (3) provide https virtual hosts for phpMyAdmin;

Generation of 8-bit non-repeating random codes using timestampsmore 0Timestamp Java 16 binary random CodeThe timestamp is the total number of seconds from January 1, 1970 (00:00:00 GMT) to the current time. Because time is not duplicated, it is

In-depth analysis of the smart socket CRACKING PROCESS Cracking the smart socket is a thing of the past. Someone has cracked the smart socket during the Geekpwn activity. However, details about how to crack smart sockets are not published. This made

Because Java has a great advantage in developing Web pages. So as a leader in the web, such as sending text messages and sending e-mails, these are the inevitable, security of the network security we need to account for the security level mentioned

Some invitation codes and activation codes are usually generated on the WEB. It must be unique and random. Below we will summarize some common methods for generating random codes and share one of our methods:   1. Write the code by yourself to

For the password to decipher the author does not understand, before the activation of a variety of serial numbers also some speculation, their own according to the idea of a serial number verification of the small framework, the tool can also be

Front desk Copy Code code as follows: Height= "/>" Style= "Cursor:pointer; Text-decoration:underline "> Change a sheet Controller Copy Code code as follows: Using System; Using System.Collections.Generic; Using