What is MIME type "application/pgp"?
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
application/pgp is a MIME type used by PGP tools for encryption, decryption, and digital signing. It marks files that contain data processed by public key cryptography systems.
This data can be keys, encrypted messages, or signed documents.
It is commonly associated with files holding security details such as:
- Encryption: Protect sensitive data so that only intended users can read it.
- Key Distribution: Carry public keys safely for verifying signatures and encrypting messages.
- Digital Signatures: Ensure data integrity and confirm the sender’s authenticity.
- Interoperability: Work with various software implementations of PGP, like GnuPG.
This MIME type is used with files like PUB and ASC, which generally store public key information, and PGP files that contain encrypted data.
They help computers and applications know how to process and handle PGP-protected data securely.
Associated file extensions
Usage Examples
HTTP Header
When serving content with this MIME type, set the Content-Type header:
Content-Type: application/pgp
HTML
In HTML, you can specify the MIME type in various elements:
<a href="file.dat" type="application/pgp">Download file</a>
Server-side (Node.js)
Setting the Content-Type header in Node.js:
const http = require('http');
http.createServer((req, res) => {
res.setHeader('Content-Type', 'application/pgp');
res.end('Content here');
}).listen(3000);
Associated file extensions
FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type
on the command line. Many programming languages also provide libraries to detect MIME types.
Why are multiple MIME types listed for one extension?
Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.