The headers of control messages issued by control@usenet.org.uk are
authenticated with a PGP signature. See

<ftp://ftp.isc.org/pub/pgpcontrol/>

for technical details, patches for CNews and INN, and a list of public keys
used by various control message issuers worldwide. For control messages
issued by control@usenet.org.uk the public key is:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: PGPfreeware 5.0i for non-commercial use
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=iInx
-----END PGP PUBLIC KEY BLOCK-----