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Last Updated : 26 Aug, 2024
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The <keygen> tag in HTML is used to specify a key-pair generator field in a form. The purpose of <keygen> element is to provide a secure way to authenticate users. When a form is submitted then two keys are generated, private key and public key. The private key is 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 the future.
Note: <keygen> tag is not supported in html5
Syntax:
<keygen name = "name">Example:
html <!DOCTYPE html><html><head> <title> HTML keygen tag </title></head><body> <h1 style="color:green;"> GeeksforGeeks </h1> <h2>Keygen Tag</h2> <form> Username: <input type="text" name="uname"> <br><br> Encryption: <keygen name="secure"> <input type="submit"> </form></body></html>
Output:
Supported Browsers: The browser supported by <keygen> tag are listed below:
- Google Chrome
- Firefox
- Safari
- Opera
HTML keygen Tag – FAQs
What attributes were commonly used with the <keygen> tag?
Common attributes included:
- name: The name of the control, used for form submission.
- challenge: A string used for additional verification during key generation.
- autofocus: Automatically focuses on the element when the page loads.
- disabled: Disables the element, preventing user interaction.
Can I still use the <keygen> tag in legacy systems?
While you can technically use the <keygen> tag in legacy systems, it is strongly discouraged due to its deprecation and lack of support in modern browsers. It is better to migrate to more current solutions.
What was a common use case for the <keygen> tag?
The <keygen> tag was commonly used in applications requiring client-side certificates, such as secure email clients or enterprise systems where user authentication was performed via certificate-based authentication.
Why is the <keygen> tag deprecated in HTML5?
The <keygen> tag is deprecated because it had limited support, caused security concerns, and newer, more secure methods for handling cryptographic operations, like the Web Cryptography API, have become available.
What is the modern alternative to the <keygen> tag?
The Web Cryptography API is the modern alternative, allowing developers to generate key pairs, handle digital signatures, and perform cryptographic operations in a more secure and controlled way.
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