With the Snapdragon 845, Qualcomm built what it calls a “secure vault” right in the heart of the platform, according to Sy Choudhury, the senior director of produict management for Qualcomm. Trusted computing environments are being hacked, and state-sponsored agencies are in play. “Even though we felt we had a high level of security, we felt we needed to raise the bar,” Choudhury said.
The Secure Processing Unit is its own separate, isolated core, with its own CPU, crypto engine, memory, its own random number generator and even its own power supply. Within the Snapdragon 845, all of the authentication takes place within the Secure Processing Unit, and all of the biometric information is stored there.