---
title: SecExternalFormat.formatPKCS7
framework: security
role: symbol
role_heading: Case
path: security/secexternalformat/formatpkcs7
---

# SecExternalFormat.formatPKCS7

Sequence of certificates, no PEM armor. PKCS7 is the Cryptographic Message Syntax Standard from RSA Security, Inc.

## Declaration

```swift
case formatPKCS7
```