MultipartText-based

`multipart/signed`

Signed Content

Reference for multipart/signed, the MIME type for digitally signed messages with a content part and signature part.

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HTTP Content-Type Header

HTTP Header

Content-Type: multipart/signed; charset=utf-8

Quick Facts

MIME Type	multipart/signed
Category	Multipart
Type	Text-based (human-readable)

Common Usage

multipart/signed wraps a message with its digital signature, allowing recipients to verify the sender's identity and message integrity. Used in S/MIME encrypted email, PGP/MIME signed messages, and secure document exchange where non-repudiation is required.

Code Examples

HTML

<!-- Set MIME type in meta or fetch headers -->
<meta http-equiv="Content-Type" content="multipart/signed">

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('multipart/signed');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'multipart/signed' });

nginx

# nginx.conf — add to types block or use default
types {
    multipart/signed  signed;
}

# Or set for a specific location
location /api/ {
    default_type multipart/signed;
}