The nice thing about Blockstack is it is not dependent on any one Blockchain. It can be ported to other blockchains and has been previously. Right now it sits o

The nice thing about Blockstack is it is not dependent on any one Blockchain. It can be ported to other blockchains and has been previously. Right now it sits on top of bitcoin as it is very hard to perform a 51% attack. if Bitcoin was under 51% attack, then we would simply accept the name state on the best fork. To learn more about how we would handle this case, you can look here: https://forum.blockstack.org/t/bitcoin-network-disruption/1344 https://forum.blockstack.org/t/bitcoin-network-disruption/13... Blockstack Core implements BNS and Atlas, the storage routing system for Gaia. Blockstack Core nodes form the backbone of the Blockstack network. Each node indexes the Bitcoin blockchain and maintains a full replica of all names, public keys, and storage routing information. This makes the Blockstack network particularly resilient to node failure---applications only need to talk to a single Blockstack Core node to work, and a new or recovering node can quickly reconstruct all of its missing state from its peers. All Atlas nodes lie on top maintain a 100% state replica, and they organize into an unstructured overlay network. The unstructured approach is easier to implement, has no overhead for maintaining routing structure and is resilient against targeted node attacks. When a new Atlas node boots up, it first gets the index of all data keys and hashes of values stored in the blockchain. After getting the index, Atlas nodes talk to their peers to fetch key/value pairs they dont have. The Atlas network implements a K-regular random graph. Let us know if you have any more questions.