20100413

I bet this exists

encrypted, private RSS/E-Mail protocol implemented on top of existing systems :

everyone has public/private key

RSS feed ( abstractly : text content )
per post encryption key
-- Can be implemented on any platform that generates RSS feeds

send out post-key encrypted with recipient public key to all recipient groups
can be implemented over :
-- E-mail
-- Facebook
-- AIM
-- Other messaging services
-- Recipient list could even be embedded in the post, though this seems wasteful

need to add reader functionality :
-- automatically unwrap key and decrypt post content

functionality :
-- secure RSS with graded access permissions

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