• Posted: 2020-11-30
  • Author: zzz
  • Posted in release

0.9.48 enables our new end-to-end encryption protocol (proposal 144) for most services. We have added preliminary support for new tunnel build message encryption (proposal 152). There are significant performance improvements throughout the router.

Packages for Ubuntu Xenial (16.04 LTS) are no longer supported. Users on that platform should upgrade so you may continue to receive I2P updates.

As usual, we recommend that you update to this release. The best way to maintain security and help the network is to run the latest release.



  • Avoid old DSA-SHA1 routers for lookups, stores, and tunnel peers
  • Block same-country connections when in hidden mode
  • BOB: Add deprecation warning
  • Build: Drop support for Xenial; ant 1.9.8 or higher required to build
  • i2ptunnel: Enable dual-key encryption for most tunnel types
  • JBigI: Add library for Linux aarch64, zen, and zen2
  • Preliminary support for ECIES-X25519 routers (proposals 152 and 156)
  • Ratchet: Efficiency improvements and memory reduction
  • SSU: Randomize intro key
  • SSU performance improvements
  • System tray: Enable by default for Linux KDE and LXDE

Bug Fixes

  • Build: Set release property for better runtime compatibility
  • Console: Fix Jetty not starting on Java
  • i2psnark: Limit size of embedded video
  • Improved IPv6 address validation
  • Installer: Disable pack200 to support Java 14+
  • Installer: Add missing linux armv7 and aarch64 wrapper binaries
  • i2ptunnel: Filter server response headers when not compressing
  • NTCP2: Fix sending termination message on idle timeout
  • Streaming: Fix handling of tag options


  • Build: Reproducible build fix
  • Core: Refactoring of data structures to reduce memory usage
  • Crypto: Cache HMAC256 instances
  • i2psnark: Hide BEP 48 padding directory in UI
  • i2psnark: Checks for unsupported v2 torrents
  • i2psnark: Remove old opentrackers
  • i2ptunnel: Improved support for offline keys
  • Jetty 9.3.29
  • NetDB: Increase minimum floodfill version for leaseset lookups
  • NTCP: Set nodelay on sockets
  • Proxy: Remove old jump servers
  • Ratchet: Rotate keys faster
  • Tomcat 9.0.40
  • Wrapper 3.5.44 (new installs only)
  • Zxing 3.4.1
  • New partial translations for Kurdish, Turkmen, Argentinian Spanish
  • Translation updates

Full list of fixed bugs

SHA256 Checksums:

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