http://www.syndie.i2p/manual.html
The URIs themselves may include passphrases
necessary for posting, etc. set --privArchive [$syndieURI[,$syndieURI]*] Specify an additional list of Syndie archives that only authorized people
will be able to see regarding the channel. set --encryptContent $boolean Specify whether the metadata should encrypt its body without publicizing
the body's encryption key. If it does, a private channel read key is included
in the metadata that can be used to view or encrypt...