Package gnupg2-smime

CMS encryption and signing tool and smart card support for GnuPG

http://www.gnupg.org/

GnuPG is GNU's tool for secure communication and data storage. This
package adds support for smart cards and S/MIME encryption and signing
to the base GnuPG package

General Commands (Section 1)
gpgsm
gpgsm is a tool similar to gpg to provide digital encryption and signing services on X.509 certificates and the CMS protocol. It is mainly used as a backend for...
scdaemon
The scdaemon is a daemon to manage smartcards. It is usually invoked by gpg-agent and in general not used directly.