Abstract: The present invention disclosed a method operable on a multiparty signing system for performing a multiparty signing act on a digital content. The multiparty signing system disclosed in the present invention comprises at least two multiparty signing servers configured with methods to perform the multiparty signing act of a digital content to sign. The multiparty signing system can be configured to perform the multiparty signing act by a private signing key split to at least two key shares, wherein each key share is held by each of the at least two multiparty signing servers. The multiparty signing system is also configured to communicate with at least one computerized node employed to conduct an approval process for approving the multiparty signing act. The approval process can be configured to conduct the approval process by employing a secure multiparty computation, wherein the approval process is configured to utilize secret shares held by the at least one computerized node.

Abstract: The claimed subject matter discloses system for securing a process of manufacturing an article, comprising a facility security node located in a manufacturing facility where the article is manufactured, a security server located remotely from the manufacturing facility, said security server communicates with the facility security node and comprises a key generation module configured to generate a certificate authority (CA) private key in a split manner, one share of the CA private key is stored at the security server and another share of the CA private key is stored at the manufacturing facility. The server also comprises a server Multi-Party Computation (MPC) module configured to perform an MPC process with an article MPC module stored at the article, the output of the MPC process is signing the certificate without reconstructing the entire CA private key.

Abstract: The present invention disclosed a method operable on a multiparty signing system for performing a multiparty signing act on a digital content. The multiparty signing system disclosed in the present invention comprises at least two multiparty signing servers configured with methods to perform the multiparty signing act of a digital content to sign. The multiparty signing system can be configured to perform the multiparty signing act by a private signing key split to at least two key shares, wherein each key share is held by each of the at least two multiparty signing servers. The multiparty signing system is also configured to communicate with at least one computerized node employed to conduct an approval process for approving the multiparty signing act. The approval process can be configured to conduct the approval process by employing a secure multiparty computation, wherein the approval process is configured to utilize secret shares held by the at least one computerized node.