PGP signing

[Allan Irving]

I have a question and this may be very, very stupid.

What I see at the moment, when a message is just signed, is a wrapper
consisting of the encryption type the public key uses and then the key
itself towards the bottom. How does GPG prevent someone from copying this,
spoofing an email address and then signing a message? Or does it not? In
this case, is simply signing a message even worthwhile in itself unless you
encrypt it?

Kind regards,


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