A very large portion patents related to ECC are optimizations for characteristic 2 curve (interesting in smart cards, perhaps, but not used here), and/or are ro

A very large portion patents related to ECC are optimizations for characteristic 2 curve (interesting in smart cards, perhaps, but not used here), and/or are roughly around now. The non-ed25519 ECC techniques in the OpenPGP standard have well establish too-old-to-be-patentable prior art: https://tools.ietf.org/html/rfc6090 https://tools.ietf.org/html/rfc6090