Abstract: Systems and methods are provided for generating a blockchain smart contract for managing user accounts and electronic wallets storing cryptocurrency. The described system includes determining a public encryption key associated with a third-party organization configured to manage blockchain transactions on behalf of a first user account, generating a first transaction data structure having a destination address field that specifies a user-account smart contract module published to a distributed ledger, wherein the first transaction data structure is configured to invoke change ownership functionality of the user-account smart contract module using the determined public encryption key associated with the third-party organization, and publishing the first transaction data structure to the distributed ledger maintained by the blockchain network of nodes.

Abstract: Disclosed are systems and methods for verifying a blockchain transaction using multiple digital signatures. A method comprises generating, by a user device, a data structure associated with a first user account from which assets are drawn and output to a second user account. The method comprises generating, by the user device, a first digital signature based on the data structure using a first private encryption key stored at the user device, and transmitting, by the user device, a verification indication comprised of a one-time password to a service provider. In response to transmitting the verification indication, the method comprises receiving a second digital signature generated by the service provider based on the data structure using a second private encryption key. The method comprises transmitting, by the user device to a blockchain network for verification, the data structure that includes the first digital signature and the second digital signature.

Abstract: Systems and methods are provided for generating a blockchain smart contract for managing user accounts and electronic wallets storing cryptocurrency.

Abstract: Disclosed are systems and methods for recovering cryptocurrency assets which may be tied to a lost personal private encryption key. The disclosed system deploys a multi-signature wallet formed from a set of keys including the user's personal key, the key of an organization provides blockchain service for the user, and a reserve key stored by third-party escrow organization. To recover a lost user private key, the system generates and digitally signs with the appropriate private keys a blockchain transaction that includes a script configured, when executed by a node in a blockchain network, to replace the user key with a replacement key.

Abstract: Disclosed are systems and methods for generating a blockchain data structure for executing an employee stock ownership plan. The described system generates and deploys within a blockchain an employee stock ownership plan (ESOP) smart contract that is associated with a subset of equity tokens representing an equity stake of a company. The ESOP smart contract has program code for constructor functionality that creates a plurality of stock option tokens corresponding to the subset of the equity tokens in the first electronic wallet associated with the company, and code for transfer functionality that converts at least a portion of the stock option tokens in a second electronic wallet to a corresponding amount of equity tokens in accordance with one or more verification rules and checks.

Abstract: The invention provides a system and method for writing data to a removable media device in accordance with a security policy. According to a method of the invention a request to write data to a first file on the removable media device is detected. Dummy data is written to the first file instead of writing the requested data. The requested data is written instead to a corresponding second file on a fixed media device. The corresponding second file is compared to a security policy. Response to the write request is based on the results of the comparison.

Abstract: The invention provides a system and method for writing data to a removable media device in accordance with a security policy. According to a method of the invention a request to write data to a first file on the removable media device is detected. Dummy data is written to the first file instead of writing the requested data. The requested data is written instead to a corresponding second file on a fixed media device. The corresponding second file is compared to a security policy. Response to the write request is based on the results of the comparison.

Abstract: According to an embodiment of a method of the invention, at least a portion of data to be processed is loaded to a buffer memory of capacity (B). The buffer memory is accessible to N processing units of a computing system. The processing task is divided into processing threads. An optimal number (n) of processing threads is determined by an optimizing unit of the computing system. The n processing threads are allocated to the processing task and executed by at least one of the N processing units. After processing by at least one of N processing units, the processed data is stored on a disk defined by disk sectors, each disk sector having storage capacity (S). The storage capacity (B) of the buffer memory is optimized to be a multiple X of sector storage capacity (S). The optimal number (n) is determined based, at least in part on N, B and S. The system and method are implementable in a multithreaded, multi-processor computing system.