XTENSTORE: Fast Shielded In-memory Key-Value Store on a Hybrid x86-FPGA System

Abstract

We propose XTENSTORE, a system that extends the existing SGX-based secure in-memory key-value store with an external hardware accelerator in order to ensure comparable security guarantees with lower performance degradation. The accelerator is implemented on a commodity FPGA card that is readily connected with the x86 CPU via PCIe interconnect to form a hybrid x86-FPGA system. In comparison to the prior SGX-based work, XTENSTORE improves the throughput by 4-33x, and exhibits considerably shorter tail latency (>23x, 99th-percentile).