User Registration Form<\/h1>\n
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\n Address:<\/label>\n <\/textarea><br>\n <input type=\"submit\" name=\"submit\" value=\"Submit\">\n <\/form>\n <\/body>\n<\/html><\/pre><p>This form stores each submitted data in the $_SESSION['user'] array, and uses session_id () function assigns a unique ID to each form data, which can better prevent molecular denial of attack. <\/p>\n<p>Conclusion<\/p>\n<p>Hacker attacks occur every moment, so it is very necessary and important to prevent elemental denial attacks. 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<img src="/static/imghw/top_right.png" alt="" /> <span>How to prevent denial-of-repudiation attacks through PHP forms</span> </div> <div id="wjcelcm34c" class="Articlelist_txts"> <div id="wjcelcm34c" class="Articlelist_txts_info"> <h1 class="Articlelist_txts_title">How to prevent denial-of-repudiation attacks through PHP forms</h1> <div id="wjcelcm34c" class="Articlelist_txts_info_head"> <div id="wjcelcm34c" class="author_info"> <a href="http://ipnx.cn/member/887227.html" class="author_avatar"> <img class="lazy" data-src="https://img.php.cn/upload/avatar/000/887/227/63bb7851c9547215.jpg" src="/static/imghw/default1.png" alt="WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB"> </a> <div id="wjcelcm34c" class="author_detail"> <a href="http://ipnx.cn/member/887227.html" class="author_name">WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB</a> </div> </div> </div> <span id="wjcelcm34c" class="Articlelist_txts_time">Jun 24, 2023 am 09:46 AM</span> <div id="wjcelcm34c" class="Articlelist_txts_infos"> <span id="wjcelcm34c" class="Articlelist_txts_infoss on">php form validation</span> <span id="wjcelcm34c" class="Articlelist_txts_infoss ">Form security</span> <span id="wjcelcm34c" class="Articlelist_txts_infoss ">Prevent repudiation attacks</span> </div> </div> </div> <hr /> <div id="wjcelcm34c" class="article_main php-article"> <div id="wjcelcm34c" class="article-list-left detail-content-wrap content"> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-5902227090019525" data-ad-slot="3461856641"> </ins> <p>With the development of Internet technology, we now often need to perform various form operations through the Internet, such as logging in, registering, submitting feedback, etc. If these form operations are not guarded against, they can easily be used by hackers to carry out malicious attacks. One of the attack methods is "molecule denial attack". This article will introduce how to prevent malicious denial attacks through PHP forms while ensuring the data security of user websites. </p> <p>What is "element denial attack"? </p> <p> "Molecular denial attack" refers to an attack method in which hackers use Web forms to submit malicious data to the backend, and then deny that they have submitted the data by tampering with or deleting relevant records. For example, a hacker performs malicious operations on a website, but they deny this behavior and claim that no such application was submitted. This is an "elementary denial attack." </p> <p>Methods to prevent elemental denial attacks</p> <p>Fortunately, we can prevent this kind of attack through some simple and effective methods. The methods are as follows:</p> <ol><li>Confirm submission Human identity</li></ol> <p>In website forms, before collecting user data, it is recommended that users be forced to register and log in, so that the user's identity can be confirmed and the data is not submitted anonymously . </p> <ol start="2"><li>Record the IP address and timestamp</li></ol> <p>After receiving the form submission, record the IP address and timestamp of the Web request, and when storing the submitted data, This information is stored together, which can help administrators quickly identify the authenticity of submitted data. </p> <ol start="3"><li>Set the form verification code</li></ol> <p>Using the form verification code to confirm that the submitter is not only valid, but also can greatly reduce actor denial attacks. Form CAPTCHAs protect against automated attacks, such as bot or malware attacks. </p> <ol start="4"><li>Connect to other services</li></ol> <p>You should connect to other services, such as SPAM checkers, digital signatures, or authentication for your app, to better identify attackers and Protect your data. </p> <ol start="5"><li>Reasonable data verification</li></ol> <p>Before collecting user data, it is necessary to perform reasonable data verification on the data entered by the user, such as confirming the data type, length, and range. , format, etc., and must be verified again when storing data. This effectively prevents hackers from submitting malicious data and also prevents users from submitting incorrect data. </p> <p>Use PHP forms to prevent denial-of-repudiation attacks</p> <p>The above methods are relatively common, but when using PHP forms to prevent, we have an additional prevention method - use When Session stores data, it assigns a unique session ID. Using $_SESSION to manage form submission data can track the user's submission behavior, thereby effectively preventing denial-of-repudiation attacks. </p> <p>The following is a sample code that uses a PHP form to prevent denial-of-repudiation attacks: </p><pre class='brush:php;toolbar:false;'><?php session_start(); if(!isset($_SESSION['user'])) { $_SESSION['user'] = array(); } if(isset($_POST['submit'])) { $name = $_POST['name']; $email = $_POST['email']; $phone = $_POST['phone']; $address = $_POST['address']; $timestamp = time(); $ip = $_SERVER['REMOTE_ADDR']; $session_id = session_id(); // 根據(jù)需要存儲的表單數(shù)據(jù)，構(gòu)建一個數(shù)組 $form_data = array('name' => $name, 'email' => $email, 'phone' => $phone, 'address' => $address, 'timestamp' => $timestamp, 'ip' => $ip, 'session_id' => $session_id); // 存儲表單數(shù)據(jù)到 $_SESSION 數(shù)組中 $_SESSION['user'][] = $form_data; } ?> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Register Form</title> </head> <body> <h1>User Registration Form</h1> <form action="" method="post"> <label for="name">Name:</label> <input type="text" name="name"><br> <label for="email">Email:</label> <input type="email" name="email"><br> <label for="phone">Phone:</label> <input type="text" name="phone"><br> <label for="address">Address:</label> <textarea name="address"></textarea><br> <input type="submit" name="submit" value="Submit"> </form> </body> </html></pre><p>This form stores each submitted data in the $_SESSION['user'] array, and uses session_id () function assigns a unique ID to each form data, which can better prevent molecular denial of attack. </p> <p>Conclusion</p> <p>Hacker attacks occur every moment, so it is very necessary and important to prevent elemental denial attacks. Through the above measures and sample codes, you can effectively prevent molecular denial-of-repudiation attacks in PHP form operations and protect the security of your user data. </p><p>The above is the detailed content of How to prevent denial-of-repudiation attacks through PHP forms. For more information, please follow other related articles on the PHP Chinese website!</p> </div> </div> <div id="wjcelcm34c" class="wzconShengming_sp"> <div id="wjcelcm34c" class="bzsmdiv_sp">Statement of this Website</div> <div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. 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As a widely used network application, the security issues of Web applications have also attracted much attention. Forms in web applications are an important part of connecting users to interact with back-end databases, and their security issues are also the primary target for web application attackers. This article will introduce how to improve the security of your forms by using the SuhosinPHP extension. 1. 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Cybercrime and hacking are becoming increasingly common, and many websites have become targets, especially those involving user authentication or sensitive data storage. To resist these attacks, websites should adopt a series of security measures, including forms security policies. 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It contains a variety of different HTML tags, such as forms, input boxes, drop-down menus, etc. A basic HTML form class</p> </div> <div id="wjcelcm34c" class="phphistorical_Version2_mids"> <a href="http://ipnx.cn/faq/565536.html" title="PHP forms security strategy: Use security measures under shared hosting" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/168756608263691.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="PHP forms security strategy: Use security measures under shared hosting" /> </a> <a href="http://ipnx.cn/faq/565536.html" title="PHP forms security strategy: Use security measures under shared hosting" class="phphistorical_Version2_mids_title">PHP forms security strategy: Use security measures under shared hosting</a> <span id="wjcelcm34c" class="Articlelist_txts_time">Jun 24, 2023 am 08:21 AM</span> <p class="Articlelist_txts_p">With the popularity of websites, in order to interact with users, we usually use HTML forms to collect user data. HTML forms can collect sensitive information such as user names, email addresses, passwords, and more. Therefore, protecting the data of these forms must be an important factor to consider when we design the website. PHP is a popular language used for developing dynamic websites. It can also handle HTML form data, however, if the form handling script is accidentally written using insecure PHP code, an attacker can easily obtain the user-provided</p> </div> <div id="wjcelcm34c" class="phphistorical_Version2_mids"> <a href="http://ipnx.cn/faq/632044.html" title="How to handle form validation errors in PHP?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/170149505856452.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to handle form validation errors in PHP?" /> </a> <a href="http://ipnx.cn/faq/632044.html" title="How to handle form validation errors in PHP?" class="phphistorical_Version2_mids_title">How to handle form validation errors in PHP?</a> <span id="wjcelcm34c" class="Articlelist_txts_time">Dec 02, 2023 pm 01:30 PM</span> <p class="Articlelist_txts_p">How to handle form validation errors in PHP? When developing web applications, form validation is a very important step. By validating form data, you can ensure that the data entered by the user conforms to the expected format and requirements, ensuring the accuracy and security of the program. When users submit form data, some errors may occur, such as missing required fields, incorrect field formats, etc. At this time, we need to catch and handle these errors in a timely manner. 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