Scalable anonymity with I2P
In I2P, each participating peer keeps a secret pool of inbound, or data-receiving, and outbound, or data-transmitting, tunnels it chooses itself. A tunnel consists of a configurable number of routers in sequence, where longer tunnels mean more anonymity, at the expense of performance. When a peer sends data, it is passed through one of its outbound tunnels, at the end of which it enters an inbound tunnel of the recipient. For each router that is part of the chosen tunnel, a layer of encryption based on the router's key is added.
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