/usr/share/perl5/Authen/ is in libauthen-passphrase-perl 0.008-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Authen/Passphrase/
/usr/share/perl5/Authen/Passphrase.pm
/usr/share/perl5/Authen/Passphrase/AcceptAll.pm
/usr/share/perl5/Authen/Passphrase/BigCrypt.pm
/usr/share/perl5/Authen/Passphrase/BlowfishCrypt.pm
/usr/share/perl5/Authen/Passphrase/Clear.pm
/usr/share/perl5/Authen/Passphrase/Crypt16.pm
/usr/share/perl5/Authen/Passphrase/DESCrypt.pm
/usr/share/perl5/Authen/Passphrase/EggdropBlowfish.pm
/usr/share/perl5/Authen/Passphrase/LANManager.pm
/usr/share/perl5/Authen/Passphrase/LANManagerHalf.pm
/usr/share/perl5/Authen/Passphrase/MD5Crypt.pm
/usr/share/perl5/Authen/Passphrase/MySQL323.pm
/usr/share/perl5/Authen/Passphrase/MySQL41.pm
/usr/share/perl5/Authen/Passphrase/NTHash.pm
/usr/share/perl5/Authen/Passphrase/NetscapeMail.pm
/usr/share/perl5/Authen/Passphrase/PHPass.pm
/usr/share/perl5/Authen/Passphrase/RejectAll.pm
/usr/share/perl5/Authen/Passphrase/SaltedDigest.pm
/usr/share/perl5/Authen/Passphrase/VMSPurdy.pm