What is Sphinx?

Sphinx¹ anonymously routes a message from sender to receiver. It provides several properties needed for sender anonymity in multi-hop systems:

    Bitwise unlinkability: Any packet coming into a mix cannot be correlated to any outgoing packet based on its binary representation by an adversary observing the network. In other words, the packets are anonymous.
    Integrity: Resistance to active attacks like tagging and replay attacks, where the adversary modifies and re-injects messages to extract information about their destinations or content.
    Hiding routing information: No mix-node can tell the number of hops a packet has travelled so far, or the length of the path of a message. Only predecessor and successor mix-nodes are known to a given mix-node....


I needed to stretch my brain a bit more today, so thank you.