# Pastebin A0k8qTs1
rr:7 http://cdn-fastly.deb.debian.org/debian jessie-backports InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553  NO_PUBKEY 7638D0442B90D010
Reading package lists... Done
W: GPG error: http://cdn-fastly.deb.debian.org/debian jessie-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553  NO_PUBKEY 7638D0442B90D010