Method, apparatus, and electronic device for blockchain-based recordkeeping

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause a device to perform operations comprising:

• capturing streaming target data comprising video data or audio data;
• applying a hash algorithm to each of a plurality of fragments of the target data to respectively generate a plurality of hash values, each of the hash values corresponding to one of the plurality of fragments;
• periodically extracting a key segment from the streaming target data by:
• detecting an abnormal event in the video data, and extracting a video segment corresponding to an occurrence period of the abnormal event as the key segment;
• or
• detecting a keyword in the audio data, and extracting an audio segment of a preset length comprising the preset keyword as the key segment;
• digitally signing, in a trusted execution environment (TEE) of the device, the corresponding hash value and the extracted key segment by using a private key stored in the TEE to generate a signature;
• generating a blockchain transaction comprising the corresponding hash value, the extracted key segment, and the signature;
• and
• transmitting the blockchain transaction to a blockchain network for consensus processing and storage of the corresponding hash value and the extracted key segment to a blockchain on the blockchain network.

A method, comprising:

• capturing, at a device, streaming target data comprising video data or audio data;
• applying, at the device, a hash algorithm to each of a plurality of fragments of the target data to respectively generate a plurality of hash values, each of the hash values corresponding to one of the plurality of fragments;
• periodically extracting, at the device, a key segment from the streaming target data by:
• detecting an abnormal event in the video data, and extracting a video segment corresponding to an occurrence period of the abnormal event as the key segment;
• or
• detecting a keyword in the audio data, and extracting an audio segment of a preset length comprising the preset keyword as the key segment;
• digitally signing, in a trusted execution environment (TEE) of the device, the corresponding hash value and the extracted key segment by using a private key stored in the TEE to generate a signature;
• generating, at the device, a blockchain transaction comprising the corresponding hash value, the extracted key segment, and the signature;
• and
• transmitting the blockchain transaction to a blockchain network for consensus processing and storage of the corresponding hash value and the extracted key segment to a blockchain on the blockchain network.