Using Self-Signed S/MIME Certificates in iOS Mail App
How to install and use self-signed S/MIME digital certificates in iOS Mail app for e-mail digital signatures and encryption.
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Create Self-Signed S/MIME Certificates
How to create self-signed S/MIME certificates to sign and encrypt e-mail for free.
Maintaining Data Change History in Oracle
How to programmatically maintain data change history in Oracle using PL/SQL triggers.