Adjective
unhackable (comparative more unhackable, superlative most unhackable)
(computing) Not hackable; that cannot be hacked or broken into.
In an effort to prevent drones from being hacked, DARPA has been developing an "unhackable system," and seems to think they're almost there. Source: Internet
No one is unhackable and even thinking that multiple cyber security products will protect you from a breach occurring is naïve. Source: Internet
This discovery is exciting, because quantum entanglement forms the basis of quantum cryptography - which aims to create “unhackable” passwords that are only accessible if someone has access to an entangled system. Source: Internet