72results about How to "Prevent repudiation" patented technology

The invention discloses an electronic bill management method and device, and belongs to the technical field of network. The method comprises the steps that a bill issuing request of a first user is received, wherein the bill issuing request carries original bill information; a first bill account corresponding to the first user is generated based on the original bill information, and the account information of the first bill account is stored in the account table in an electronic bill management system; a second block is generated based on the bill issuing request, the first bill account and the block header feature value of the first block in the block chain in the electronic bill management system, wherein the first block is the previous block of the second block on the block chain, and the second block is used for recording the bill issuing event of the first user; and an issuing success message is transmitted to the first user, wherein the issuing success message carries the first bill account. The security and the reliability of transaction information can be guaranteed by the electronic bill management method and device.

The invention discloses a credit investigation report circulation method based on a block chain and Intel SGX. The method comprises a credit investigation authorization stage, a credit investigation providing stage and a credit investigation query stage. In the credit investigation authorization stage, a credit investigation report format is customized by a personal user, and the specific authorization information is set; in the credit investigation providing stage, a credit investigation mechanism generates a credit investigation report according to a report format defined by a personal userand authorization information; and the credit investigation stage is used for inquiring and auditing a credit investigation report provided by a credit investigation mechanism by a financial institution. The report formats, the authorization information, the credit reports and the report query records involved in the flow process are encrypted through SGX and stored on the block chain. By combining the block chain and Intel SGX, the non-tampering, traceability and privacy protection of data in the credit report transfer process are realized, and the problems that a paper report is easy to tamper and forge, the user privacy attention is low, and a management and control credit report cannot be abused due to a traditional transfer method are solved.