[messaging] what is the role of wrap-resistance in onion routing?
natanael.l at gmail.com
Sat Oct 10 11:27:52 PDT 2015
Den 10 okt 2015 16:30 skrev "Jeff Burdges" <burdges at gnunet.org>:
> I haen't quite understood the wrap-resistance property for onion
> routing protocols defined in , although I first noticed in section 4
> of the Sphinx paper .
> In short, they do not want attackers to be able to take valid onion
> packets, add a layer to the onion, and test it against a router.
If the router successfully decrypts it, it may or may not recognize the
packet and thus respond in a way that's usable as an oracle, revealing if
this packet did once pass through this node or not.
If it for example has replay resistance, a timing attack may reveal of the
router either don't understand the packet or if it knows what tunnel it
belongs to and knows that's a duplicate.
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