Abstract: Systems and methods for secure digital asset transactions. An offline system includes a custodian computer, digital asset accounts accessible by the custodian computer and a centralized ledger maintained by the custodian computer. The custodian computer is in communication with public ledger computers of a public ledger, and receives transaction data associated with digital assets from among entity computers. Each account is prefunded with digital asset funds. The custodian computer monitors a transaction parameter of the transaction data and, in accordance with the monitoring, generates a transfer instruction indicating transfer of funds between the first and second accounts, updates the centralized ledger responsive to the transfer instruction, and transfers the funds between the first and second accounts, responsive to the transfer instruction. The transfer instruction remains offline and is not transferred to the public ledger.

Abstract: A system for an electronic-based market is disclosed. The system operates with a model where a trader is designated to enter orders for contracts on behalf of a subscriber. The model uses assets of the subscriber that are placed into an account that is accessible by the electronic market to cover risks associated with trades initiated by the trader. The system includes a plurality of client stations for entering orders into the electronic market by traders and a server to receive the orders and match the orders in accordance with matching criteria. The server maintains for the subscriber and the subscriber's associated traders a trading account that is accessible by the electronic market. The server also includes offsetting, clearing, default, and margin protocols functions to administer the market. The market uses species contracts that are derived from a contract genus.

Abstract: A system for an electronic-based market is disclosed. The system operates with a model where a trader is designated to enter orders for contracts on behalf of a subscriber. The model uses assets of the subscriber that are placed into an account that is accessible by the electronic market to cover risks associated with trades initiated by the trader. The system includes a plurality of client stations for entering orders into the electronic market by traders and a server to receive the orders and match the orders in accordance with matching criteria. The server maintains for the subscriber and the subscriber's associated traders a trading account that is accessible by the electronic market. The server also includes offsetting, clearing, default, and margin protocols functions to administer the market. The market uses species contracts that are derived from a contract genus.

Abstract: A system for an electronic-based market is disclosed. The system operates with a model where a trader is designated to enter orders for contracts on behalf of a subscriber. The model uses assets of the subscriber that are placed into an account that is accessible by the electronic market to cover risks associated with trades initiated by the trader. The system includes a plurality of client stations for entering orders into the electronic market by traders and a server to receive the orders and match the orders in accordance with matching criteria. The server maintains for the subscriber and the subscriber's associated traders a trading account that is accessible by the electronic market. The server also includes offsetting, clearing, default, and margin protocols functions to administer the market. The market uses species contracts that are derived from a contract genus. Also described is a margin release process triggered upon settlement.