Secure Semi-reliable UDP is one of two encrypted Transports for Kovri.
Similar to NTCP, SSU's primary purpose is to securely transmit In net I2NP messages through Tunnels but, unlike NTCP, SSU functions solely over encrypted UDP.
- Like NTCP, SSU is a connection-oriented, point-to-point data transport
- Termed semi-reliable because SSU will repeatedly retransmit unacknowledged messages (up to maximum number then dropped)
- SSU also provides several unique services (in addition to its function as a Transport layer):
For further details, read Java I2P's SSU