公开(公告)号：US20230163974A1

公开(公告)日：2023-05-25

申请号：US17989965

申请日：2022-11-18

Applicant: PACKETFABRIC, INC.

Inventor： Nicholas Mainardi

IPC: H04L9/32 ,  H04L9/08

CPC classification number: H04L9/3242 ,  H04L9/085 ,  H04L9/3247 ,  H04L2209/46

Abstract: A method for message authentication includes computing a first secret data and a second secret data using a signing key associated with a first communication message. The method includes splitting the first secret data and the second secret data into shares among a plurality of key holders n for storage at the plurality of key holders n. The method includes receiving a reconstruction request to compute a hash-based message authentication code (HMAC) signature for the first communication message employing the shares from at least t≤n of the plurality of key holders n to compute the signature with a Secure Multi-party Computation (SMC) protocol. Further the method includes computing the signature using the shares from the at least t≤n of the plurality of key holders n as inputs to the SMC protocol in place of the signing key.