In HTML, the Keygen tag is used to generate an encryption key for passing the encrypted data to a server. It is one of the new sectioning elements in HTML 5. The main purpose of the element is to provide a secure way to authenticate users.
When an HTML < form> is submitted, the browser will generate two keys. One is a private key and another one is a public key. The private key stored locally , and the public key is sent to the server. The public key is used to generate a client certificate to authenticate the user for future purposes.
Estimated reading time: 3 minutes
Syntax:
The tag doesn’t require the closing tag in HTML. But in XHTML it contains both the opening tag and closing tag.
<keygen name= "name">
HTML Tag Characteristics:
th, td{ padding: 20px; }
| HTML tag | This tag specifies a key-pair generator field used for forms |
| Content categories | Flow content, Phrasing content, interactive content, listed, labelable, submittable, resettable form-associated element, palpable content. |
| Permitted content | None. It is an empty element. |
| Tag omission | Must have a start tag and end tag is not required. |
| Permitted parents | Any HTML element that accepts phrasing content. |
| Permitted ARIA roles | None |
| DOM interface | HTMLKeygenElement |
Sample of the HTML Tag:
<!DOCTYPE html>
<html>
<head>
<title>HTML <keygen> Tag</title>
</head>
<body>
<h2>Example of the HTML <keygen> Tag</h2>
<form action="/form/submit" method="get">
<keygen name="rsaPublicKey" keytype="RSA">
User Name:
<input type="text" name="usr_name">
<input type="submit">
</form>
</body>
</html>
Note : The functionality of the element in HTML depended on the web browser and the corresponding web server program.
Result:
Download Sample File:
Attributes:
The HTML keygen tag supports both the Global Attributes and Event Attributes.
th, td{ padding: 20px; }
| Attribute | Value | Description |
|---|---|---|
| autofocus | autofocus | This attribute is used to define the loading of the page the element must automatically receive a focus. Not supported in Internet Explorer and Firefox. |
| challenge | challenge | It defines the call string , that is passed along with the public key. The attribute value is any text string. If the attribute isn’t specified, the default is an empty string. |
| disabled | disabled | This indicates that the element must be disabled. |
| form | form_id | The form element will help to indicate the identifier of the form or forms to which the element belongs. Not supported in Internet Explorer. |
| keytype | It defines the key-encryption algorithm. | |
| rsa | From the key type attribute, the user can choose between high and medium security (the default value). | |
| dsa | Used to select the key size. | |
| ec | The user can choose between high and medium security. Not supported in Internet Explorer and Safari. | |
| name | name | Helps to define the name of the element. |
Browser Support:
Related Articles:
- HTML Form Tag
- HTML Data List Tag
- Basic HTML Definitions and Usages in the Real World
- HTML Applet Tag
- HTML Tag
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