Red hat network Updates Not Signed;

[Mirco Scaramucci]

Hello everybody.
I re installed Fedora 4 yesterday 3 times and all the times I tried to
update the system via the REd Hat network updater, once the download of
the necessary updates had finished, the system started complaining about
the updates not being signed.
Is this normal?
Should I accept the updates even though not digitally signed?

Thanks