A method for maintaining state and event information for all of a user's devices associated in a common location using a blockchain where each block includes an event block and a device block within it, where each event and device block refers to an earlier block of the respective type, resulting in a blockchain-in-a-blockchain architecture. The device and event blocks store data regarding each device associated with a user and events related to the devices/user, respectively. Any time a new event occurs, or a device is registered or removed, a new set of blocks is created, where submissions regarding device changes or events can be made by any participant due to the decentralized and public nature of a blockchain. The result is a system where all data regarding a user's registered devices and events is kept in a common location in a manner that is auditable and verifiable.

Some implementations of the disclosure are directed to receiving, at an authentication server system, a distributed ledger address transmitted by a client device to identify itself during an authentication process for accessing a network, where the distributed ledger address corresponds to a distributed ledger network; transmitting an authentication challenge message from the authentication server to the client device; in response to transmitting the authentication challenge message from the authentication server to the client device, receiving at the authentication server, a response to the challenge message including a signature; and using at least the distributed ledger network to determine if the signature used to sign the response to the challenge message is associated with the distributed ledger address transmitted by the client device.

The present technology discloses methods and systems for receiving a security profile request from an integrity verifier, the request including a nonce; requesting, from a trusted platform module, a new nonce, wherein the new nonce is generated at least in part by the nonce and a current timestamp from a clock in the trusted platform module; receiving, from the trusted platform module, the new nonce; requesting, from a cryptoprocessor, a set of platform configuration registers; receiving, from the cryptoprocessor, the set of platform configuration registers; and sending a response to the integrity verifier, the response including the new nonce and the set of platform configuration registers to verify a security status of the trusted platform module and the cryptoprocessor.

Embodiments of the invention are directed to systems, methods, and devices for securely performing federated tasks (e.g., the generation and utilizing of machine-learning models). A secure platform computer may operate a secure memory space. Entities participating in a federated project may transmit respective portions of project data defining the federated project. Each entity may provide their respective (encrypted) data sets for the project that in turn can be used to generate a machine-learning model in accordance with the project data. The machine-learning model may be stored in the secure memory space and accessed through an interface provided by the secure platform computer Utilizing the techniques discussed herein, a machine-learning models may be generated and access to these models may be restricted while protect each participant's data set from being exposed to the other project participants.

Devices can be configured to broadcast blocks incorporating artifact origination tokens. Devices can include network interfaces, memory; and processors. Processors can be configured to obtain artifact-to-time association elements. Artifact-to-time association elements can include artifact references and timestamps. Timestamps can include references to artifact references. Processors can be further configured to obtain artifact origination tokens. Artifact origination tokens can include artifact-to-time association element, certifier descriptors indicating certifier public keys, and/or certifier digital signatures. Certifier digital signatures can be generated based on certifier public keys and/or artifact-to-time association elements. Processors can be further configured to obtain ledger entries including artifact origination tokens with public keys, compute challenges based on ledger entries, and broadcast blocks incorporating the ledger entries. Blocks can be validated using cryptographic systems to obtain proof based challenges.

A process for centralized user file encapsulation, encryption, notarization and verification using a blockchain and a system that certifies data in a proprietary “capsule” file format, with tamper-proof blockchain are disclosed. By utilizing a hybridization of both cloud and blockchain storage mechanisms, the present invention allows for the performant and cost-effective certification of large amounts of data. Furthermore, the generation of the capsule allows for users to store both the data payload and its digital notarization. The system then allows for users to share the capsule with others (by way of permissions enforced by the notary system) and upload it for verification of authenticity at a later point in time.

A system and method for efficiently managing an executable environment involving multiple code-sign certificate chains. The system and method include receiving, by one or more processors and from a client device, a request for information to verify an authorization of a code bundle, the code bundle associated with a first signed code segment and a second signed code segment. The system and method include generating, by one or more processors, a list of certificates associated with the code bundle. The system and method include transmitting, by the one or more processors and to the client device, a message comprising the list of certificates, the message causing the client device to verify the code bundle based on the list of certificates.

A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for deploying a smart contract in a blockchain network. The computer-implemented method includes: receiving, by a blockchain node in a blockchain network, a transaction for creating a smart contract, wherein the transaction comprises machine codes of the smart contract, and the machine codes of the smart contract are obtained by a compilation service provider performing Ahead of Time (AoT) compilation on bytecodes of the smart contract; determining, by the blockchain node, that the machine codes of the smart contract are obtained by a trusted compilation service provider; and in response to determining that the machine codes of the smart contract are obtained by the trusted compilation service provider, completing, by the blockchain node, a deployment of the smart contract.

The invention relates to a method for producing a cryptographically signed transaction for the transfer of an amount of a currency within a blockchain. The transaction comprises one or more inputs and one or more outputs. The method comprises: retrieving the one or more inputs, the inputs being a reference to one or more previous transactions, determining the one or more outputs, each output defining an amount to be transferred to a receiver indicated in the respective output, adding security information, the security information defining directly or indirectly a maximum amount to be spent with the transaction, and cryptographically signing the transaction by adding signature information.

An electronic device and method are disclosed for managing a non-fungible token (NFT). The electronic device includes: a memory configured to store computer-executable instructions, and a processor. The processor implements the method, including: generating, a NFT for target content in response to receiving a request to register the target content from a first external electronic device, generating, for the NFT, a certification authority (CA) signature indicating that the NFT is generated by the server, and transmitting, via a communication circuitry, the NFT to the first external electronic device, wherein an ownership signature is added to the NFT, together with the CA signature, the ownership signature based on a private key of a user to which ownership of the NFT is assigned.