paperkey
An OpenPGP key archiver. tldr-pages
On several platforms
Several platforms
Take a specific secret key and generate a text file with the secret data
paperkey --secret-key path/to/secret_key.gpg --output path/to/secret_data.txtIdentifyTake the secret key data in secret_data.txt and combine it with the public key to reconstruct the secret key
paperkey --pubring path/to/public_key.gpg --secrets path/to/secret_data.txt --output secret_key.gpgIdentifyExport a specific secret key and generate a text file with the secret data
gpg --export-secret-key key | paperkey --output path/to/secret_data.txtIdentify