Because all data within the Hyperion Node (HN) engine is split into micro shards, even if a hacker were to decrypt one of these shards, it would be useless and without context—and the other shards would be impossible to find.
Trying to hack data stored within HN is like trying to complete 10,000 puzzles that each have 10,000 pieces—and all the pieces are shuffled together, with no reference pictures to guide you.
While no system is unhackable, HN is hacker unprofitable. By approaching security from a hacker perspective, the engine's security protocols completely strip hacking of any financial incentive.