Dear friends, Request For Criticism about what I've written: Current blockchains are all genesis-block based, which means they are ever-growing structures. Aside of being under the effects of an elastic-gum force that complicates their scalability in size, there exist problems scaling on addresses or scaling on bandwith. What touches to cryptography comes straight when dealing of ever-growing structures. Such a buried pile of layers of information requires consideration because it contains cryptography of past times. There are two problems with that. 1.- can expire secrets. 2.- The runtime software must be equiped with all cypher-suites used in the past, including those too old to rely on who were already cracked, broken. A challenge is the to design a platform that does not depend on cypher-suites that were needed in the past. Once a new encryption technology deprecates another, the platform must be able to replace the cypher-suite and forget about the previous one. Thanks, Regards : ) -- OA