Over time, customers have asked us how RMS compares to or interoperates with S/MIME or PGP. This post will briefly address this issue without going into too much technical detail.
First, there are some important similarities between these technologies:
Now let’s look at what is different:
As far as interop goes, from within Microsoft Outlook, which today is the main mail app that uses RMS, you can apply both RMS policy and S/MIME protection on the same email, e.g. you can create a “Do Not Forward” email that you sign with your S/MIME certificate. Interop between RMS and PGP is more implementation dependent, based on what PGP/GPG front end plugin you use. At the very least, you ought to be able to attach a PGP-encrypted file to an RMS-protected mail, much like you can attach any doc in an RMS protected mail.
Clearly, there is more to discuss here, and you should read some more about RMS, PGP, and S/MIME online in order to appreciate the similarities and differences between these technologies. I can post some more information in the future if there is interest on this topic.