man GnuPG::SubKey (3): GnuPG Sub Key objects

SYNOPSIS

# assumes a GnuPG::PublicKey object in $key
my @subkeys = $key->subkeys();
# now GnuPG::SubKey objects are in @subkeys

GnuPG::SubKey objects are generally instantiated through various methods of GnuPG::Interface. They embody various aspects of a GnuPG sub key.

This package inherits data members and object methods from GnuPG::Key, which are not described here, but rather in GnuPG::Key.

validity: A scalar holding the value GnuPG reports for the trust of authenticity (a.k.a.) validity of a key. See GnuPG's DETAILS file for details.
local_id: GnuPG's local id for the key.
owner_trust: The scalar value GnuPG reports as the ownertrust for this key. See GnuPG's DETAILS file for details.
signature: * DEPRECATED*
A GnuPG::Signature object holding the representation of the signature on this key. Please use signatures (see GnuPG::Key) instead of signature. Using signature, you will get an arbitrary signature from the set of available signatures.