[pim] Q: "open" group multicast sender authentication. ..

Hi folks

I am trying to remember if we ever wrote down a mechanism to cryptograpically
authenticate the sender of IP multicast packets - including replay attack
prevention! - without having to rely on shared keys like in GDOI and hence
the need to trust a group of receivers.

I am pretty sure that there was at some time an interesting cryptographically
new proposal for this - a few years ago - but i don't remember enough keywords
to find it (which WG, what was the name). Even the AI tools are thoroughly
useless ;-))

And of course, simple authenticating packets with time-stamps 
signing with certificate is well-known... and well-known expensive...

Cheers
    Toerless

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