A person emailed me his PGP signature. When I compared it to the signature from the PGP server, it is much shorter not matching at all. I use the version 1.4.9.

1. Why is the signature so short?
2. Why does it not match the server?
3. What is the signature of about 100 bits' encryption?  



    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.4.7 (NetBSD)
    
    iD8DBQBKl0BmzbodwsP3RI0RAqQwAKCsP�覃ᝋꜴ鉰਍�
    1TEDKNU8/04JTQRbHotaDd0=
    =Ju5N
    -----END PGP SIGNATURE-----