[__turbobrew__]

How does this compare with TPUs? Can you not have secrets in the TPU which cannot be accessed directly by apps, solving this threat vector? I get that you want compatibility with popular libraries, but I wonder if the actual solution is to use hardware support to enforce the secret boundaries.

[neo2006]

I'm not super familiar with TPUs and Trusted execution environments but my understanding is that it serve a different threat model.

TEE aim to protect a certain workload from the host to avoid another workload on the same host from steeling secrets. Kloak aim is to protect the secret from the workload itself not the host.

[__turbobrew__]

Protecting the secret from the host is a superset of protecting the secret from a workload.