CPC H04L 9/3247 (2013.01) [H04L 9/50 (2022.05); H04L 2209/46 (2013.01)] | 20 Claims |
1. A system for multi-party computation between a first party and a second party, the system comprising:
a first computer device associated with the first party; and
a trusted execution environment (TEE) associated with the first computer device, wherein the first computer device is programmed or configured to:
communicate, to the TEE, a first computation input and a first portion of a one-time key;
receive, from the TEE, an encrypted output of a computation based on the first computation input and a second computation input, wherein the second computation input and a second portion of the one-time key are communicated to the TEE by a second computer device associated with the second party, and wherein the encrypted output is encrypted by the TEE with the one-time key;
communicate the encrypted output to the second computer device;
receive a digital signature from the second computer device indicating that the second computer device received the encrypted output;
communicate the first portion of the one-time key to the second computer device; and
(i) in response to receiving the second portion of the one-time key from the second computer device, determine the one-time key from the first portion of the one-time key and the second portion of the one-time key, and determine the computation by decrypting the encrypted output with the one-time key; or
(ii) in response to not receiving the second portion of the one-time key from the second computer device, execute a fallback computation process using the TEE and a ledger accessible to both the first computer device and the second computer device to determine the computation.
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