Also note that GreenAddress.it is an implementation of a proposal made by Gavin Andresen back in 2013 https://gist.github.com/gavinandresen/5616606 https://gist

Also note that GreenAddress.it is an implementation of a proposal made by Gavin Andresen back in 2013 https://gist.github.com/gavinandresen/5616606 https://gist.github.com/gavinandresen/5616606 with nlocktime to unlock your funds.