I2P 2.9.0 Release notes:

- Thread usage has been improved to improve the performance of i2ptunnel

- NTCP2 has been improved to resist probing attacks.

- Work continues on implementing automatic bandwidth management for tunnels, the Datagram2 protocol, and Post-Quantum cryptography. In two releases, at 2.11.0, I2P will require Java 17.

geti2p.net/en/blog/post/2025/0

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