Abstract: A multi-layer cybersecurity system and method for protecting digital wallets holding blockchain-based tokens traded on a financial platform. Specifically, the invention employs random temporal windowing in relation to: (1) reshuffling designated machines running a multi-party computation protocol; and (2) rekeying of private keys held in both hot and cold environments. Furthermore, environmental based signature weighting is applied to the keys. As a result, cold signers can do anything hot signers can but hot signers cannot do what cold signers can such as taking control, recovering control, or reconstitute the holdings of the wallet in real time, if necessary.