> On device scanning did not exist before apple Virus scanners scan on devices. Practically all big brand commercial scanners nowadays scan and check findings

> On device scanning did not exist before apple Virus scanners scan on devices. Practically all big brand commercial scanners nowadays scan and check findings on-the-fly online. That said, Microsoft ships Defender since XP or so. Apple has some basic malware scanning since Catalina where it compares hashes of executables. Facebook checks hashes of pictures sent in messages against hashes of abuse picture since years. > Their hashing algorithm by nature of being a hashing algorithm will have collisions. Yes and no. You'll probably not find any collision in a SHA-3 hash. Quite likely you won't even encounter a SHA-1 collision. But this Neural Hash? It's been published since this short amount of time and already such a collision is being presented. As a user I probably don't want Viruses, Ransomware or anything with comparable destructiveness on my computer. But at the same time the implementation should be rock-solid and user-controllable. That's a no-brainer for anything sha-based but for Neural Hash it isn't.