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Licences and credits

What Pigeon ships from others, and whom we credit.

Third-party software

Pigeon uses open-source components under permissive licences, plus a short list of file-level copyleft (MPL-2.0) components used unmodified. Their notices ship with the app. On Windows, the installer also carries Microsoft's WebView2 loader.

The font

This site and the Pigeon logotype use Inter 4.1, by The Inter Project Authors, under the SIL Open Font License 1.1. It is served from this site, never from a font service. The licence: OFL.txt.

Research we build on

  • Asymmetric message franking: Tyagi, Grubbs, Len, Miers and Ristenpart, CRYPTO 2019; IACR ePrint 2019/565, under CC BY.
  • Message franking: Grubbs, Lu and Ristenpart, CRYPTO 2017.
  • Padmé padding: Nikitin et al., PoPETs 2019.
  • The seed-phrase wordlist: the BIP39 English list (MIT).