, which described another core piece of the modern blockchain — digital signatures.
There are many more quivers to Chaum’s bow; his research output is a marvel — so many major innovations in the field have his imprimatur on them. Which has, of course, left a lot of people making a credible case that he is in fact Satoshi Nakamoto, which he does not confirm or deny.He has an important case to make about the centrality of privacy to blockchain and its spawn, and to the general lack of understanding of the difference between what we think is private , and real privacy.
This allowed them to piece people and events together in space and time. They could get the actual conversations, but the “metadata” was enough for them to help overthrow a foreign government. .Chaum has written extensively on the metadata vulnerability in modern messaging systems, disingenuously obfuscated with words like “end-end encryption” which seems to satisfy most of us.