Implementations of the specification include receiving, by a smart contract service provider including a trusted computation execution environment (TEE) from a client associated with a target blockchain network, a request for operating cross-chain data of one or more blockchain networks different from the target blockchain, wherein the smart contract service provider is off the target blockchain network; sending, by the smart contract service provider to a data visiting service provider, a request for the cross-chain data; receiving, by the smart contract service provider, the cross-chain data from the data visiting service provider; generating, by the TEE, a result using the cross-chain data; and returning, by the smart contract service provider, the result to the client.

Off-chain smart contract service based on trusted execution environment

Example methods, apparatus, systems and articles of manufacture (e.g., non-transitory physical storage media) to provide trust topology selection for distributed transaction processing in computing environments are disclosed herein. Example distributed transaction processing nodes disclosed herein include a distributed transaction application to process a transaction in a computing environment based on at least one of a centralized trust topology or a diffuse trust topology. Disclosed example distributed transaction processing nodes also include a trusted execution environment to protect first data associated with a centralized trust topology and to protect second data associated with a diffuse trust topology. Disclosed example distributed transaction processing nodes further include a trust topology selector to selectively configure the distributed transaction application to use the at least one of the centralized trust topology or the diffuse trust topology to process the transaction.

Trust topology selection for distributed transaction processing in computing environments

A method of preserving privacy for usage of a lightweight blockchain client in a blockchain network includes using, in a full blockchain node of the blockchain network, a secure software guard extensions (SGX) enclave. A request is received from the lightweight blockchain client for a setup of a secure network connection. A client unique ID is received from the lightweight blockchain client, and is acknowledged following a successful attestation by the lightweight blockchain client. A request is received from the lightweight blockchain client for transaction(s)/address(es) of the lightweight blockchain client. The SGX enclave loads and searches unspent transaction outputs (UTXO) from a memory of the full blockchain node and sends a response to the request from the lightweight blockchain client for the transaction(s)/address(es) based on a match from the searching the UTXO. The secure communication is then terminated with the lightweight blockchain client.

Method and system of preserving privacy for usage of lightweight blockchain clients

A system and method are disclosed in which a node of a peer-to-peer (P2P) network supporting a blockchain is able to restart following network or power disruption (or is able to initially join the blockchain network) by bootstrapping information from one or more peer nodes in the P2P network. The bootstrapping operation involves communication between the Trusted Execution Environments (TEEs) of the two or more nodes. The system and method ensure that the retrieval of data related to the blockchain state are not from untrusted parts of the peer node(s) and the data has not been tampered with (avoidance of replay attacks).

Fast and secure protocol to bootstrap a blockchain by restoring the blockchain state using trusted execution environment

The embodiment of the application discloses a block chain-based inspection and storage method and device, and electronic equipment. The method comprises the following steps: acquiring inspection dataof a plurality of inspection sites in an inspection activity sequence through a mobile terminal, wherein the inspection data comprises inspection certification information collected at the inspectionsites and running environment parameters of the terminal equipment when the inspection certification information is collected; based on the relation between the running environment parameters corresponding to the plurality of inspection sites in the inspection activity sequence, performing anomaly detection on the inspection data of the plurality of inspection sites in the inspection activity sequence; and when the anomaly detection is passed, submitting the transaction carrying irreversible verification information of the inspection data to a storage block chain through a block chain interface, so as to store the transaction to a distributed account book of the storage block chain.

Block chain-based inspection and storage method and device, and electronic equipment

An apparatus in an illustrative embodiment comprises a processing platform that includes one or more processing devices each comprising a processor coupled to a memory. The processing platform is configured to communicate over at least one network with one or more additional sets of processing devices associated with at least a first blockchain-based cryptocurrency system. Each of at least a subset of the one or more processing devices of the processing platform comprises a trusted execution environment, such as a secure enclave. The processing platform is further configured to release from the trusted execution environment of a given one of the one or more processing devices of the processing platform a first blockchain transaction on the first blockchain-based cryptocurrency system, and to condition release of a second blockchain transaction relating to the first blockchain transaction on receipt of at least a specified threshold amount of evidence of confirmation of the first blockchain transaction on the first blockchain-based cryptocurrency system.

Real-time cryptocurrency exchange using trusted hardware

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Real-time cryptocurrency exchange using trusted hardware