Cointelegraph: Renowned Cryptographer Says His Patent Was an Obstacle for Hal Fi nney. [1]https://cointelegraph.com/news/renowned-cryptographer-says-his-patent-was-an- obstacle-for-hal-finney References 1. https://cointelegraph.com/news/renowned-cryptographer-says-his-patent-was-an-obstacle-for-hal-finney