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• W2979237716 abstract "Today users' private data in edge computing devices (desktops, laptops, and tablets, etc.) is at high risk because they run applications on potentially compromised or malicious systems. To address this problem, hardware vendors propose Trusted Execution Environment (TEE). Particularly, Intel has released a new processor feature called Software Guard eXtension (SGX), and provisions shielded executions (i.e., enclaves) for security-sensitive computations. Regrettably, Intel SGX's design objectives omit trusted I/O paths. Without such guarantees, it is unlikely for an enclave to fulfill its security and privacy purposes because the source or sink of data may have been corrupted. To this end, we propose a novel architecture called Aurora to provide trusted I/O paths for enclave programs even in the presence of untrusted system software. Specifically, Aurora exploits two commercial-off-the-shelf features (System Management Mode, SMM and SGX) and establishes a secure channel between an enclave program and target device. Furthermore, we design and implement trusted paths for HID keyboard, serial port printer, hardware clocks, and USB mass storage, respectively. Leveraging these trusted paths, we protect real-world applications including OpenSSH client, OpenSSL server/client and SQLite database. Security and performance evaluations show that Aurora mitigates several kinds of I/O related attacks and introduces acceptable overheads. Our framework has been open-sourced and is available to the security community." @default.
• W2979237716 created "2019-10-10" @default.
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• W2979237716 date "2020-01-01" @default.
• W2979237716 modified "2023-10-17" @default.
• W2979237716 title "Establishing Trusted I/O Paths for SGX Client Systems With Aurora" @default.
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• W2979237716 doi "https://doi.org/10.1109/tifs.2019.2945621" @default.
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