A link to the Kiststore is in my reply above. This is where licensed partners can find all the information on encrypting their posts. Are you licensed to sell posts?
From my understanding post-processor encryption is only available for solution partners, not for regular customers.
A regular customer would never need encryption, since he would never sell a PP.
If you sell your PP, then you need to be accepted as a solution partner to be able to encrypt your PPs.
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