Ethereum has this planned for lamport signatures in Serenity. https://blog.ethereum.org/2015/12/24/understanding-serenity-part-i-abstraction/ https://blog.ethe

Ethereum has this planned for lamport signatures in Serenity. https://blog.ethereum.org/2015/12/24/understanding-serenity-part-i-abstraction/ https://blog.ethereum.org/2015/12/24/understanding-serenity-... There is also a new project called the Quantum Resistant Ledger. https://github.com/theQRL/qrl https://github.com/theQRL/qrl