Method for providing correlated randomness for secure multiparty computation

A computer system configured to provide correlated randomness for secure multiparty computation using a plurality of computing machines, computing system configured to:

• execute a trusted execution environment system;
• set up at least one correlated randomness generator in the trusted execution environment system;
• perform remote attestation of a single correlated randomness generator by all computing machines or remote attestation of a plurality of correlated randomness generators by in each case one computing machine;
• inject in each case at least one secret by all of the computing machines into a single correlated randomness generator or injecting at least one secret by one computing machine into in each case one correlated randomness generator;
• check the injected secrets by the correlated randomness generator(s);
• generate correlated randomness for the computing machines depending on the injected secrets;
• and
• distribute the correlated randomness to the computing machines, wherein each of the computing machines receives only one of the correlated randomness created for it.

A non-transitory computer-readable medium on which is stored a computer program for providing correlated randomness for secure multiparty computation using a plurality of computing machines, the computer program, when executed by a computer system, causing the computer system to perform the following steps:

• executing a trusted execution environment system;
• setting up at least one correlated randomness generator in the trusted execution environment system;
• remote attestation of a single correlated randomness generator by all computing machines or remote attestation of a plurality of correlated randomness generators by in each case one computing machine;
• injecting in each case at least one secret by all of the computing machines into a single correlated randomness generator or injecting at least one secret by one computing machine into in each case one correlated randomness generator;
• checking the injected secrets by the correlated randomness generator(s);
• generating correlated randomness for the computing machines depending on the injected secrets;
• and
• distributing the correlated randomness to the computing machines, wherein each of the computing machines receives only one of the correlated randomness created for it.