Good article. I asked this in the reddit forum but didn't get a response:
If my transaction is stored on only 3 nodes on holochain, what's to prevent a malicious actor from using the DHT to locate all three nodes, and completely modify their history?
Since he did not change their DNA, how will other nodes realise an attack took place? How will they replace the corrupted data, since all three nodes have been compromised? Theoretically, he could just wipe the data clean and leave the DNA intact.
(I use 3 nodes as an example, but the point is, hash tables are not replicated over the entire network, so to do a 100% attack on a record, you just have to find the nodes that hold it)