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Intel to phase out SGX after Xeon Diamond Rapids in favor of TDX

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Intel to phase out SGX after Xeon Diamond Rapids in favor of TDX

Just five years after bringing its Software Guard Extensions (SGX) technology to its mainstream server platform, Intel on Friday announced plans to discontinue its support after its upcoming Xeon 'Diamond Rapids' CPUs and concentrate its confidential computing efforts on Trust Domain Extensions (TDX). The company will continue to support existing SGX-enabled platforms into the early 2030s, but at the same time will expand TDX capabilities to address emerging requirements of cloud computing, enterprise workloads, and agentic AI applications.

Without a doubt, data sovereignty requirements are an increasingly important factor as organizations seek to protect sensitive information from unauthorized access even when they process it on infrastructure operated by third parties. Although both Intel SGX and TDX are designed to protect sensitive information while it is being processed, they use substantially different approaches.

SGX provides hardware-protected enclaves within applications to isolate selected code and data from other software, including the operating system and hypervisor. By contrast, TDX isolates entire virtual machines from the underlying host environment, including the hypervisor and other VMs. While SGX requires developers to design or modify applications to use protected enclaves, TDX can protect existing workloads inside confidential VMs without extensive changes to individual applications, something that makes TDX particularly attractive to cloud service providers that operate large numbers of virtual machines.

While both SGX and TDX have faced numerous security vulnerabilities over the years, including side-channel attacks, privilege-escalation flaws, and attacks against their attestation mechanisms, Intel does not cite security concerns as a reason for its decision to discontinue SGX.


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