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Cloud computing has emerged as a corner stone of today's computing landscape.More and more customers who outsource their infrastructure benefit from themanageability, scalability and cost saving that come with cloud computing.Those benefits get amplified by the trend towards microservices. Instead ofrenting and maintaining full VMs, customers increasingly leverage containertechnologies, which come with a much more lightweight resource footprint whilealso removing the need to emulate complete systems and their devices.  However, privacy concerns hamper many customers from moving to the cloud andleveraging its benefits. Furthermore, regulatory requirements prevent theadaption of cloud computing in many industries, such as health care or finance.Standard software isolation mechanisms have been proven to be insufficient ifthe host system is not fully trusted, e.g., when the cloud infrastructure getscompromised by malicious third-party actors. Consequently, confidentialcomputing is gaining increasing relevance in the cloud computing field.  We present Trusted Container Extensions (TCX), a novel container securityarchitecture, which combines the manageability and agility of standardcontainers with the strong protection guarantees of hardware-enforced TrustedExecution Environments (TEEs) to enable confidential computing for containerworkloads. TCX provides significant performance advantages compared to existingapproaches while protecting container workloads and the data processed by them.Our implementation, based on AMD Secure Encrypted Virtualization (SEV), ensuresintegrity and confidentiality of data and services during deployment, andallows secure interaction between protected containers as well as to externalentities. Our evaluation shows that our implementation induces a lowperformance overhead of 5.77% on the standard SPEC2017 benchmark suite.

Trusted Container Extensions for Container-based Confidential Computing