Subject: smime-signed-enc-hp-shy
From: Alice <[email-masked]>
To: Bob <[email-masked]>
Date: Sat, 20 Feb 2021 10:12:02 -0500

This is the
smime-signed-enc-hp-shy
message.

This is a signed-and-encrypted S/MIME message using PKCS#7
envelopedData around signedData.  The payload is a text/plain
message. It uses the Header Protection scheme from RFC 9788 with
the `hcp_shy` Header Confidentiality Policy.

--
Alice
[email-masked]