What does the message mean while encrypting?

[Faramir]

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John W. Moore III escribió:
> 张靖 wrote:
> 
>> It is NOT certain that the key belongs to the person named
>> in the user ID.  If you *really* know what you are doing,
>> you may answer the next question with yes.
> 
> Try adding the following line to gpg.conf
> 
> trust-model always
> 
> or You can place a Local Signature on the Key.

  I figure the local signature is a better option, since it won't change
the "safe" behaviour of gpg...
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