moon@DKTP:~$  sudo apt-key list
/etc/apt/trusted.gpg
--------------------
pub   rsa4096 2016-04-12 [SC]
      EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796
uid           [ unknown] Google Inc. (Linux Packages Signing Authority) <linux-packages-keymaster@google.com>
sub   rsa4096 2016-04-12 [S] [expires: 2019-04-12]
sub   rsa4096 2017-01-24 [S] [expires: 2020-01-24]

pub   rsa4096 2018-05-23 [SC] [expires: 2019-08-16]
      931F F8E7 9F08 7613 4EDD  BDCC A87F F9DF 48BF 1C90
uid           [ unknown] Spotify Public Repository Signing Key <tux@spotify.com>

pub   rsa2048 2014-11-04 [SC] [expires: 2019-03-25]
      A338 F71A 89CD 06FD 5F97  1858 2F7F 0DA5 FD5B 64B9
uid           [ unknown] home:strycore OBS Project <home:strycore@build.opensuse.org>

pub   rsa3072 2018-12-10 [SC]
      D43F 6401 4536 9C51 D786  DDEA 76F1 A20F F987 672F
uid           [ unknown] WineHQ packages <wine-devel@winehq.org>
sub   rsa3072 2018-12-10 [E] [expires: 2020-12-09]

/etc/apt/trusted.gpg.d/graphics-drivers_ubuntu_ppa.gpg
------------------------------------------------------
pub   rsa4096 2015-08-12 [SC]
      2388 FF3B E10A 76F6 38F8  0723 FCAE 110B 1118 213C
uid           [ unknown] Launchpad PPA for Graphics Drivers Team

/etc/apt/trusted.gpg.d/spotify-2018-05-23-48BF1C90.gpg
------------------------------------------------------
pub   rsa4096 2018-05-23 [SC] [expires: 2019-08-16]
      931F F8E7 9F08 7613 4EDD  BDCC A87F F9DF 48BF 1C90
uid           [ unknown] Spotify Public Repository Signing Key <tux@spotify.com>

/etc/apt/trusted.gpg.d/steam.gpg
--------------------------------
pub   rsa2048 2012-12-07 [SC]
      BA18 16EF 8E75 005F CF5E  27A1 F24A EA9F B054 98B7
uid           [ unknown] Valve Corporation <linux@steampowered.com>
sub   rsa2048 2012-12-07 [E]

/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-archive.gpg
------------------------------------------------------
pub   rsa4096 2012-05-11 [SC]
      790B C727 7767 219C 42C8  6F93 3B4F E6AC C0B2 1F32
uid           [ unknown] Ubuntu Archive Automatic Signing Key (2012) <ftpmaster@ubuntu.com>

/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg
------------------------------------------------------
pub   rsa4096 2012-05-11 [SC]
      8439 38DF 228D 22F7 B374  2BC0 D94A A3F0 EFE2 1092
uid           [ unknown] Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>

/etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg
------------------------------------------------------
pub   rsa4096 2018-09-17 [SC]
      F6EC B376 2474 EDA9 D21B  7022 8719 20D1 991B C93C
uid           [ unknown] Ubuntu Archive Automatic Signing Key (2018) <ftpmaster@ubuntu.com>