[jor-el]

Can someone throw some light on why Google is not using ARM Trustzone technology? Many current Android OEMs are using it, particularly Samsung KNOX is security mechanism all built around trustzone technology.

What advantages does these Titan chips offer over the existing trustzone technology.

[rkangel]

Trustzone is on the same die, same physical memory. Presumably they think that it's potentially vulnerable to the sidechannel attacks they mention.

Plus, they want a full, open source, verifiable system which isn't possible with ARM IP.