Hybrid Trust Multi-party Computation with Trusted Execution Environment
Pengfei Wu, Jianting Ning, Jiamin Shen, Hongbing Wang, Ee‐Chien Chang
Abstract
Trusted execution environment (TEE) such as Intel SGX relies on hardware protection and can perform secure multi-party computation (MPC) much more efficiently than pure software solutions. However, multiple side-channel attacks have been discovered in current implementations, leading to various levels of trust among different parties. For instance, a party might assume that an adversary is unable to compromise TEE, while another might only have a partial trust in TEE or even does not trust it at all. In an MPC scenario consisting of parties with different levels of trust, one could fall back to pure software solutions. While satisfying the security concerns of all parties, those who accept TEE would not be able to enjoy the benefit brought by it.