SMIME vs PGP

[Philipp Gühring]

Hi,

> S/MIME itself is not used outside of email apps, however the certificates
> (keys), sometimes referred to as X.509 certificates, S/MIME uses are able
> to be used by other apps, eg for digital signatures in applications such as
> Open Office, 

OpenOffice uses XML-DSig, not S/Mime. 

> and Adobe Acrobat, 

The PDF Format uses PKCS#7, not S/Mime. 

XML-DSig, PKCS#7 and S/Mime are all using X.509 certificates.
(And even CMS, but I haven´t seen that one in practice yet)

Best regards,
Philipp GÜhring