Encryption card based enterprise key distribution method and encryption card based tax declaring method

Abstract

The present invention discloses an encryption card based enterprise key distribution method. The method comprises: generating a master key at a local side; determining whether an old master key is stored in an external encryption card; if the old key is stored, reserving the old key for a pre-determined period of time and deleting the old key; if the old key is not stored, taking the currently generated master key as an initial master key; enabling the local side to perform expansion according to the master key and stored enterprise information, so as to generate an initial envelope and distribute the initial envelope to an enterprise terminal; enabling the local side to determine whether tax declaring data sent by the enterprise terminal is received; when the tax declaring data of the enterprise terminal is received, checking the tax declaring data, and returning a check result to the enterprise terminal; and generating an update envelope according to the master key, so as to send the update envelope to the enterprise terminal along with the check result, wherein the update envelope comprises a new updated enterprise key, an update period of the new enterprise key, a maximal loss-reporting number of times within the update period, an invoice size and invoice storage region size information. The present invention further discloses a tax declaring method.

Description

technical field [0001] The present invention relates to an encryption card-based enterprise key distribution method and an encryption card-based tax reporting method. Background technique [0002] With the rapid development of modern communication technology, especially the rapid change of computer network technology, more and more people hope to exchange data safely through modern communication network. In modern cryptography, the secrecy of data generally does not depend on the secrecy of the algorithm, but only on the secrecy of the key. Therefore, in order to obtain security, it is necessary to have a safe and reliable key management method. [0003] Key distribution is the core issue of key management. Key distribution is the process of establishing common encryption materials between communication parties. It is required to ensure the integrity, source authenticity and confidentiality of encryption materials. The purpose of the key distribution protocol or the key agr...

AI Technical Summary

Problems solved by technology

[0004] The traditional key distribution method cannot meet the functions of this system. If the expired master key is not retained after the update, the enterprise cannot issue invoices normally during the tax return buffer period; it cannot meet the requirements of using the enterprise key to generate tax based on the invoicing elements when the enterprise invoices. The control code is printed in the invoice, and the invoice containing the tax control code is a valid invoice

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