4 results about "Chain system" patented technology

The invention provides a block chain borrowing method and system. The method is applied to multiple borrower terminals in the block chain borrowing system. The method comprises the steps that a loan request is submitted to a block chain system; when a necessary information supplement notification sent by lender terminals or a risk management terminal is received, encrypted necessary information corresponding to the necessary information supplement notification is written into the block chain system, wherein the necessary information supplement notification is generated according to the loan request; multiple credit and loan electronic contract files sent by multiple lender terminals according to the loan request and a signature risk management result respectively are received, wherein thesignature risk management result is generated by the lender terminals or the risk management terminal according to the encrypted necessary information and written into the block chain system after being encrypted; the credit and loan electronic contract files which meet a preset condition are selected for signature, and target credit and loan electronic contract files are obtained. The problem oflow safety of a transaction process and data in the prior art is solved, and the method has the advantage of improving the safety.

The embodiment of the invention provides a bandwidth capability calculation method and device based on a block chain. The bandwidth capability calculation method based on the block chain comprises thefollowing steps: obtaining a bandwidth measurement value of the communication network used by a computing node in the block chain system; confirming the bandwidth measurement value of the computing node based on the bandwidth measurement value of the communication network; obtaining the actual bandwidth traffic consumed by the computing node to process distributed computing tasks published by a task publishing node; confirming the bandwidth actual value of the computing node based on the bandwidth traffic; and calculating the balanced bandwidth value of the computing node based on the bandwidth measurement value of the computing node and the actual bandwidth value of the computing node, wherein the balanced bandwidth value is used to characterize the bandwidth capability of the computingnode in processing the distributed computing tasks; so that the bandwidth capability of the computing node to process the distributed computing tasks can be confirmed through the balanced bandwidth value.

The invention discloses a data processing method and device, a storage medium and a processor. The method comprises the following steps of combining the storage information and the authorization information of a target file, and encrypting the combined information by adopting a first public key of an authorized object to obtain a target data packet; and under the condition that the authorized object requests to access the target file, decrypting the target data packet by adopting a private key corresponding to the first public key of the authorized object, and obtaining the target file from the block chain system based on the decrypted data. Through the application, the problem that the central server is easily attacked when the file is stored on the central server and the access to the file is authorized in the related technology, so that the file is difficult to safely and accurately access, is solved.

The invention discloses a block chain quick retrieval method, comprising the following steps: S1, when the block chain system stores the block, the block name of the block and the addresses corresponding to all transaction participants of the block are stored in the block name file; S2, the block name is stored in the block name file; S2, when the names of one or more designated transaction participants are input, the addresses of each transaction participant are respectively obtained by searching user files; S3: the block name file through the address is retrieved, and a block name list matched with the input condition is acuiqred; S4: The block chain system parses the corresponding blocks in the list one by one until the target blocks are retrieved. The invention extends the processing process of the block storage, adds the block name file, and establishes a table index mechanism similar to a relational database based on the address of a transaction participant, which greatly improves the block retrieval efficiency and expands the application field of the block chain.