Is this the one you're looking for?
http://download.opensuse.org/distribution/leap/15.3/repo/oss/gpg-pubkey-6517...
[cid:c2a2e1f4-bc6f-4abe-b63a-64eb2a2ed3f5]
Erico Mendonca
Premium Services
SUSE
________________________________
From: eric.schirra@localdomain.dehaem on behalf of Eric Schirra
Sent: Monday, March 22, 2021 9:41 AM
To: opensuse-packaging@opensuse.org
Subject: Public Key for Leap 15.3
Hello,
can someone tell me where i can get public keys for Backports:SLE-15-SP3 to
build Leap 15.3 packages under Leap 15.2?
Example for my error:
Verifying integrity of cached packages
using keys from SUSE:SLE-15:Update, SUSE:SLE-15:GA, SUSE:SLE-15-SP3:GA,
SUSE:SLE-15-SP2:Update, SUSE:SLE-15-SP2:GA, SUSE:SLE-15-SP1:Update, games,
SUSE:SLE-15-SP1:GA, openSUSE:Leap, openSUSE
warning: /var/tmp/osbuild-packagecache/openSUSE:Backports:SLE-15-SP3/standard/
x86_64/libminiupnpc-devel-2.0.20171102-bp153.1.33.x86_64.rpm: Header V3 RSA/
SHA256 Signature, key ID 65176565: NOKEY
/var/tmp/osbuild-packagecache/openSUSE:Backports:SLE-15-SP3/standard/x86_64/
libminiupnpc-devel-2.0.20171102-bp153.1.33.x86_64.rpm : public key not
available
Regards
Eric