README for the debian-ports-archive-keyring package
The debian-ports archive digitally signs its Release files that are
stored on the debian-ports.org ftp-sever and its mirrors with the
keys contained in this package.
Upon installation of this package, the debian-ports related keys are
updated using the apt-key command, that is the keys contained in
debian-ports-archive-keyring are automatically installed into apt's
trusted keyring by the package, while the one contained in
debian-ports-archive-keyring-removed are automatically removed.
More information about the archive authentication feature can be found