Computationally sound Bitcoin tokens

10/03/2020

∙

by   Massimo Bartoletti, et al.

∙

0

∙

share

We propose a secure and efficient implementation of fungible tokens on Bitcoin. Our technique is based on a small extension of the Bitcoin script language, which allows the spending conditions in a transaction to depend on the neighbour transactions. We show that our implementation is computationally sound: that is, adversaries can make tokens diverge from their ideal functionality only with negligible probability.