How to perform key signature verification

[Janusz A. Urbanowicz]

Mark Sargent wrote:

> Hi all,
>   I am developing a small gpg encrypted network. All participants must have
> their keys signed by the network administrator.
> 
> Is there a command other than --list-sigs that I can use to verify and
> ensure that a key has been signed by an 'admin' key.
> 
> I wish to perform this check when encrypting and decrypting to prevent non
> authorised users gaining access.
> 
> All ideas, thoughts, suggestions welcome

This is what web of trust is for. Do you have control over endpoints GPG 
setup?

Alex