Invalid Key

[Carl Jenkins]

Hi  all,

I had RH9.0, but consider mysleft very inexpierenced at linux still.
I installed fedora and have the update exlamation point blinking at me.
After I launch update it downloads some updates , but others such as 
binutils for example.
It says that it has been tampered with or has an invalid key and will not 
install.

Why is this? Am I updating fedora incorrectly?

Thanks,

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