Yum question

[linuxMaestro]

Why do i get these message when ever I run yum?
warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 025e513b
Error: Could not find the GPG Key necessary to validate
?

warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 025e513b
Error: Could not find the GPG Key necessary to validate pkg /var/cache/yum/base/packages/gcc-3.2.3-42.i386.rpm
Error: You may want to run yum clean or remove the file:
/var/cache/yum/base/packages/gcc-3.2.3-42.i386.rpm
Error: You may also check that you have the correct GPG keys installed

 

[ericbrunson]

RPMs can be signed with a GPG key to validate their authenticity, but you have to have the public half of the GPG keypair they were signed with added to your RPM database.