End-to-end encryption is important, however data is most vulnerable not when traveling from place to place, but when it’s stored or displayed at one end or the other – on a screen, on a disk, in memory, or on some device in the cloud. That’s why security experts are excited about blockchain technology, which offers the potential to provide critical endpoint security in three ways: (1) by verifying the origin of applications; (2) by confirming whether data has been tampered with; and (3) by improving user privacy.