Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario descargar pdf (Pagina 49)

What if I haven't had John Random Hacker's public key? In this case, the

message would appear as such:

The message is signed, but the signature cannot be verified at all. This is also

how a recipient that does not use Enigmail, nor any other OpenPGP software,

will see the message. As expected, the original text is still readable: signature

ensures authentication of the sender, not confidentiality of the message.

Note how OpenPGP manipulates the mail when signing. The original message

is prepended by a line

-----BEGIN PGP SIGNED MESSAGE-----

and then it is specified which hash function has been used. Then there is the

original message. Finally, the digital signature, embedded within two lines

-----BEGIN PGP SIGNATURE-----

and

-----END PGP SIGNATURE-----

is appended to the message. Within the signature there is a line that specifies

the version of GnuPG used. It is also possible to put an additional GnuPG

comment line after the version, by passing additional parameters to the GnuPG

command line; this will be explained in Section 9.1.4.

The lines starting with ----- are called PGP headers.

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Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario Pagina 49