Electronic document safety protection method

Abstract

The invention discloses an electronic document safety protection method belonging to the technical field of information safety and computer software. The method comprises the steps of: a, encrypting a plaintext by a secrecy requesting party to obtain an encrypted document, wherein the encrypted document comprises a ciphertext obtained by symmetrically encrypted the plaintext by using a secret key I and a ciphertext obtained by asymmetrically encrypted the secret key I by using a secret key II; b, transmitting the encrypted document to a classified management party by using the secrecy requesting part, decrypting by the classified management party through using a secret key corresponding to the secret II to obtain the plaintext; c, encrypting the plaintext by using the classified management party to obtain a classified document, wherein the classified document comprises a ciphertext obtained by symmetrically encrypted the plaintext by using a secret key III and a ciphertext obtained by asymmetrically encrypted the secret key III by using a secret key IV; and d, transmitting the classified document to a classified document audience by using the secrecy management party. The invention can be used for the safety protection of the electronic document.

Description

technical field [0001] The invention relates to electronic file encryption, in particular to an electronic file security protection method, which prevents information leakage and tampering through electronic file encryption, and belongs to the technical fields of information security and computer software. Background technique [0002] The traditional confidentiality management for paper documents is realized by marking the confidentiality level of the documents and sealing them up. There are strict registration and approval procedures for sending, delivering, receiving, borrowing, handing over, destroying, filing and other links of confidential documents. After the duplication of confidential documents is approved and approved by the secrecy work department, it will be printed by the designated copying unit of the state secret carrier; there is a specific scope limit for reading confidential documents, such as not being taken to personal space or public places; confidential...

AI Technical Summary

Problems solved by technology

[0004] At present, electronic documents of different confidentiality levels are controlled by the document operator. This control and access method is related to the document operator's awareness of confidentiality and responsibility, and there is a potential problem of leaking due to personal negligence.

For electronic documents of different confidentiality levels, the entire life cycle from creation to destruction depends only on the management of the document operator, and the authenticity, integrity and validity of the documents cannot be guaranteed.

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