On 04-07-17, Wayne Hartell wrote: > > > >Did you try to change mirror you use in your sources.list? > > > > I did and it doesn't help (I get the same error with multiple different > sources). > > GPG error: http://deb.debian.org/debian stretch-updates InRelease: The > following signatures couldn't be verified because the public key is not > available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010The > repository 'http://deb.debian.org/debian stretch-updates InRelease' is not > signed.Updating from such a repository can't be done securely, and is > therefore disabled by default.See apt-secure(8) manpage for repository > creation and user configuration details. > > Notably, the keys (e.g., 8B48AD6246925553 and 7638D0442B90D010) ARE present > when I run 'apt-key list'. > > When I search this forum for these keys (e.g., "8B48AD6246925553") I find > two threads with similar kinds of errors, but no solution on either. I'm > wondering whether I have fallen into some kind of crack perhaps. >
Not sure that it will be helpful, but just a thought. How about reinstalling debian-archive-keyring package?