Apparatus and associated methods relate to presenting for selection services comprising at least one bundled set of healthcare services to be performed separately by respective providers, determining a bundle price for the at least one bundled set of healthcare services, and in response to receiving payment in an amount of the bundle price, generating a purchase data record selectively redeemable to receive each of the at least one bundled set of healthcare services, and transmitting a unique confirmation number generated for the purchase data record. One or more service of the bundled set may be a dental or veterinary service. The bundle price may be based on a location or time at which at least one service will be performed and may be determined using a user's remaining insurance deductible. Payment may be disbursed to multiple providers of the bundled set of healthcare services. A payment may be virtual funds.

A system for providing a large set of data resources for nearly any client with a centralized collection of historical data, and a server through which changing datasets located on provider networks may be accessed through the system without having to upload them to the system. The system providers a marketplace for buying and selling of data, optionally including blockchain technology to allow for secure and/or anonymous transactions.

Systems and methods for securely storing digital assets using a secure portal are disclosed. Using an isolated computer within an electronic isolation chamber, a plurality of digital asset accounts may be generated, and one or more private keys and a digital asset account identifier corresponding to each of the digital asset accounts may be obtained. A respective reference identifier may be associated with each digital asset account. At least one of the one or more private keys corresponding to each digital asset account may be divided into a plurality of private key segments and written to a card along with the respective reference identifier to create sets of collated cards, wherein each set comprises cards corresponding to different private keys.

A control method including: receiving first transaction data including a first electronic signature from the a home of a first user; verifying whether the received first electronic signature included in the first transaction data is valid; verifying validity of the received first transaction data; when the first electronic signature and the validity of the first transaction data are verified successfully, executing a first consensus algorithm for the first transaction data; and when the validity of the first transaction data is verified according to the first consensus algorithm, recording a block including the first transaction data in a distributed ledger. The first electronic signature is a group signature assigned to a group to which the first user belongs.

Bitcoins and the underlying blockchain technology are one of the main innovations in building decentralized applications. The effects of quantum computing on this technology are analyzed in general. Provided herein are effective solutions to address security vulnerabilities in a blockchain-based system that can be exploited by a quantum attacker.

An assignable realestate system includes a processor, a storage medium, a wireless device including a digital key, a lock assembly for access to realestate, a data file, and a blockchain application. The data file is stored in the medium, and includes a plurality of linked blocks. Each block includes a respective asset transaction data of a plurality of asset transaction data with each data being time stamped. The blockchain application is stored in the medium and executed by the processor. The blockchain application is configured to apply the data file to determine a current asset transaction data of the plurality of asset transaction data and output an authorization signal to the lock assembly associated with the device for access to the realestate.

A method for identification of malicious internet content and campaigns is provided. The method extracts a cryptocurrency indicator within a compromised data set and inserts the cryptocurrency indicator into a threat intelligence database. The method identifies a set of cryptocurrency transactions associated with the cryptocurrency indicator. From the cryptocurrency indicator and the set of cryptocurrency transactions, the method generates a transaction graph with a set of features representing the set of cryptocurrency transactions. The method modifies the threat intelligence database with at least a portion of the transaction graph.

A computer-implemented method includes creating a premiums escrow, with a zero balance, for a group of policyholders and managed using a distributed ledger and self-executing agreement. At a term beginning, the self-executing agreement receives premium payments using cryptocurrency from each policyholder and allocates the premium payments to the premiums escrow. During the term the self-executing agreement receives a notification of an incident claim associated with a claimant policyholder. At a term end, the self-executing agreement receives payment instructions from the policyholders; pays, using cryptocurrency from the premiums escrow, the claimant an incident claim payment larger than the premium payment and determined according to the payment instructions; and distributes to the policyholders a rebate payment equal to or lower than the premium payment from the premiums escrow, which returns to a zero balance. The self-executing agreement stores a record of the incident claim in a tamper-proof, publicly-available, non-repudiable distributed ledger.

A verifying entity of a decentralized system is configured to receive information associated with at least one ledger entry of a distributed ledger of the decentralized system, to verify at least a portion of one or more computations associated with the received information, to generate evidence of at least one error in the at least a portion of the one or more computations associated with the received information, and to associate the generated evidence with a public key of the verifying entity. The decentralized system may comprise a proof of space based mining system, and the at least one ledger entry of the distributed ledger may comprise at least one proof of space for the proof of space based mining system.

Provided is an information management system that comprises: a payment information confirmation device which is connected over a network to a cryptocurrency system management terminal that manages a cryptocurrency system, which extracts transaction information including address information for a seller account in a cryptocurrency system, and which generates and transmits payment confirmation information including at least a transfer amount from the extracted transaction information; and a register device which is connected to the payment information confirmation device, receives the payment confirmation information from the payment information confirmation device, displays the received payment confirmation information, converts the currency units of an entered transaction amount into a cryptocurrency units payment amount in the currency units of the cryptocurrency system, generates a two-dimensional code in which are recorded the cryptocurrency units payment amount and the address information, and displays the generated two-dimensional code.