scdaemon 2.2.20-1ubuntu4 (amd64 binary) in ubuntu impish

 GnuPG is GNU's tool for secure communication and data storage.
 It can be used to encrypt data and to create digital signatures.
 It includes an advanced key management facility and is compliant
 with the proposed OpenPGP Internet standard as described in RFC4880.
 .
 This package contains the smart card program scdaemon, which is used
 by gpg-agent to access OpenPGP smart cards.