Cryptology ePrint Archive: Report 2016/086

Intel SGX Explained

Victor Costan and Srinivas Devadas

Abstract: Intel's Software Guard Extensions (SGX) is a set of extensions to the Intel architecture that aims to provide integrity and privacy guarantees to security-sensitive computation performed on a computer where all the privileged software (kernel, hypervisor, etc) is potentially malicious.

This paper analyzes Intel SGX, based on the 3 papers that introduced it, on the Intel Software Developer's Manual (which supersedes the SGX manuals), on an ISCA 2015 tutorial, and on two patents. We use the papers, reference manuals, and tutorial as primary data sources, and only draw on the patents to fill in missing information.

This paper's contributions are a summary of the Intel-specific architectural and micro-architectural details needed to understand SGX, a detailed and structured presentation of the publicly available information on SGX, a series of intelligent guesses about some important but undocumented aspects of SGX, and an analysis of SGX's security properties.

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Date: received 30 Jan 2016, last revised 13 Feb 2016

Contact author: victor at costan us

Available format(s): PDF | BibTeX Citation

Note: Incorporated feedback from various sources, including the Intel SGX design team

Version: 20160214:025145 (All versions of this report)

Short URL: ia.cr/2016/086

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