Tag: TEE

Hardware key attestation lets an Android app prove to its backend that a key lives in secure hardware on a locked, verified device. It is also the wall that stops a security analyst working on a rooted phone. This article opens the mechanism from the analyst's chair, from the certificate chain and the attestation extension down to the root of trust, then shows a simple bypass that never touches the secure hardware. We relay the attestation to a clean device and splice a genuine chain back into the target app with a Frida hook. A companion repository ships the validation backend, the demo apps and the instrumentation, so the whole setup can be run and inspected rather than taken on faith.

This third article from the Samsung's TrustZone series details some vulnerabilities that were found and how they were exploited to obtain code execution in EL3.

In this second blog post of our series on Samsung's TrustZone, we present the various tools that we have developed during our research to help us reverse engineer and exploit Trusted Applications as well as Secure Drivers.

In this first article of a series of three, we will give a tour of the different components of Samsung's TrustZone, explain how they work and how they interact with each other.

This blog post provides the reader with an overview of the Intel SGX technology, as a follow-up to SGX Internals. In this second part, we quickly explain how an application interacts with its enclave. We also detail what pieces of software are included within the SDK and PSW. Finally, we summarize the known attacks and concerns with this technology, as well as conclude on the subject.

This blog-post provides the reader with an overview of the Intel SGX technology. In this first part, we explore the additions made to Intel platforms to support SGX, focusing on the processor and memory. We then explain the management and life cycle of an enclave. Finally, we detail two features of enclaves: secret sealing and attestation.