Systems and methods for resilient multiparty cryptography

Abstract

Systems and methods for multiparty cryptography that is resilient and gives end-users custodianship of their own cryptographic keys are provided. A method includes a trusted third party that combines secret shares received from user devices to recover a secret that is then used to perform a cryptographic operation. Another method includes using single-use public and private keys that are sent from user devices to a software which performs a cryptographic operation. A further method includes generating values that are a function of user device's secret shares, inputting the values to a DPRF function to derive a DPRF value that is used to perform a cryptographic operation. The methods further provide for key rotation for added security and key recovery in case of lost or corrupted keys or secret shares.

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