[gcp]

That's not what the documentation is about, though:

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Use GPG with the cipher AES256, without the --armour option, and with compression to encrypt your files during inter-host transfers. GPG

Encryption helps protect your files during inter-host file transfers (for example, when using the scp, bbftp, or ftp commands). We recommend GPG (Gnu Privacy Guard), an Open Source OpenPGP-compatible encryption system.

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scp shouldn't be in that list.

[falcolas]

If your goal is to transfer securely from person to person, 'scp' generally means there's a common server you're accessing - not that you're 'scp'ing directly to the other user's machine. Keeping it secure when "at rest" on the remote server would ensure it's securely transferred between the two end points.