Huawei Technologies Co., Limited

Huawei International Pte. Ltd.

Shuang Wu

Tsz Hon Yuen

Yanjiang Yang

Zhuo Wei

Wei He

Embodiments of this application provide a blockchain-based data processing method, a device, and a medium. The method includes: sending a first channel closing message on a chain-off channel; receiving a second signature in a second state and a second channel closing message that are sent on the off-chain channel, where the second signature is obtained by signing the second channel closing message; and signing a third channel closing message to obtain a first signature in the second state, and sending the first signature. This application can ensure transaction security and improve a transaction processing capability.

Blockchain-based data processing method, device, and medium

A first apparatus sends a first random number to a second apparatus, where a vehicle carries the first apparatus and a first set. The second apparatus belongs to the first set. The first set further includes a third apparatus. The first apparatus communicates with the third apparatus using the second apparatus. The first apparatus receives a first message from the second apparatus. The first message includes first verification information to perform identity verification on the second apparatus. The first verification information is based on identity information of the second apparatus and the first random number. The first apparatus determines, based on the first verification information and the first random number, that the identity verification on the second apparatus has succeeded.

Identity verification method and apparatus

An encryption/decryption function generating method, an encryption/decryption method and related apparatuses, which can ensure the confidentiality of a key used in a white-box encryption and decryption function when a white-box encryption and decryption function generating algorithm is disclosed. The method includes: receiving a random seed and an original key that are input by a user; generating, according to the original key, a round key required for R-round iterative computing; generating, according to the random seed, an affine expansion mask required for the R-round iterative computing and random disturbance data required for the R-round iterative computing; and generating an encryption/decryption function.

Encryption function and decryption function generating method, encryption and decryption method and related apparatuses

A system and method for obfuscating data includes random numbers generated by applying a one-way compression function to auxiliary inputs which may at least include a secret key and a data partner identifier. For each row of data to be obfuscated, the following is performed: a plurality of data blocks is constructed from the each row of data to be obfuscated, wherein the number (n) of the data blocks is predetermined; a dot product is generated which is obtained by: generating a plurality of products by multiplying each of the plurality of data blocks with an exclusive one of the plurality of random numbers and summing the plurality of products; and an obfuscated form of the each row of data to be obfuscated is generated by determining a remainder of a modulo operation which is performed using the dot product as dividend and a predetermined integer value as divisor.

Growing community of inventors

Singapore, Singapore

Shuang Wu