Data pledge method and system, electronic device and storage medium

The invention relates to a data pledge method and system, an electronic device and a storage medium, and the data pledge method comprises the steps: obtaining target data of a user side through responding to a pledge request of the user side, carrying out the local encryption of the target data through employing a preset encryption algorithm, obtaining a first ciphertext, and carrying out the local encryption of the target data based on a preset intelligent contract rule, performing Hash calculation on the first ciphertext to obtain a first Hash value, and transmitting the first Hash value to a block chain system of a guarantee party of the target data, so that the guarantee party compares the first Hash value with a second Hash value pre-uploaded by a user party, and when the first Hash value is consistent with the second Hash value, the target data is transmitted to the block chain system of the guarantee party of the target data. And providing a guarantee for the target data. According to the method, the a