File encryption and decryption system, encryption and decryption devices and encryption and decryption methods

A technology for encryption, decryption, and files, which is applied in transmission systems, digital transmission systems, and secure communication devices. It can solve problems such as illegal acquisition of data, prevent illegal users from obtaining data content, and hacker attacks on transmission, etc., so as to improve security, Effects that increase the difficulty of cracking

Inactive Publication Date: 2012-02-01
FU TAI HUA IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when transmitting data through the network, problems such as hacker attacks or transmission errors may be encountered, resulting in the illegal acquisition of data by third parties
Therefore, at present, data is usually encrypted when transmitting data. Even if the data is illegally obtained by a third party, it is not easy to obtain the content of the data for illegal users.
[0003] At present, a fixed key is usually used to encrypt data, which is easy to crack through repeated attempts

Method used

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  • File encryption and decryption system, encryption and decryption devices and encryption and decryption methods
  • File encryption and decryption system, encryption and decryption devices and encryption and decryption methods
  • File encryption and decryption system, encryption and decryption devices and encryption and decryption methods

Examples

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Embodiment Construction

[0019] see figure 1 , is a hardware architecture diagram of the system for encryption and decryption of the present invention. The system 1 includes a sender 10 and at least one receiver 20 connected to the sender 10 through a network 200 . The sender 10 may be an electronic device such as a personal computer, a server, or any other applicable computer. The recipient 20 may be a personal terminal device such as a personal computer or a mobile phone.

[0020] The network 200 may be the Internet, a local area network or a wireless communication network.

[0021] The sender 10 encrypts pictures, audio, video and other files and sends them to the receiver 20 through the network 200. After receiving the encrypted file, the receiver 20 decrypts it to obtain the file.

[0022] see figure 2 , for the present invention figure 1 A functional block diagram of the sender 10 in FIG. The sender 10 includes a storage unit 101 , a communication module 102 , a timing module 103 , an acq...

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PUM

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Abstract

The invention discloses an encryption method, which comprises the following steps of: receiving a transmission request and starting timing, wherein the transmission request comprises a receiver address and contents to be transmitted; acquiring a Fourier expansion and the number of terms, and acquiring a file to be transmitted according to the contents to be transmitted in the transmission request; acquiring a timed time length after the acquisition is finished; selecting corresponding terms of the Fourier expansion according to the number of terms, substituting the timed time length into the corresponding terms of the Fourier expansion, and adding each term to obtain an encryption key; encrypting the file to be transmitted by utilizing the encryption key; and transmitting the encrypted file to a receiver according to the receiver address in the transmission request. The invention also provides a decryption method, an encryption and decryption system, an encryption device and a decryption device. By the system, the devices and the methods provided by the invention, difficulties in the cracking of the encrypted file can be increased.

Description

technical field [0001] The invention relates to a protection system and method for electronic data, in particular to a computer system for file encryption and decryption based on Fourier series and a file encryption and decryption method. Background technique [0002] With the rapid development of computer network technology, it has brought great convenience to people's life, and people often transmit information to others through the network. However, when transmitting data through the network, problems such as hacker attacks or transmission errors may be encountered, resulting in the illegal acquisition of data by a third party. Therefore, at present, data is usually encrypted when transmitting data. Even if the data is illegally obtained by a third party, it is not easy to obtain the content of the data for illegal users. [0003] At present, data is usually encrypted with a fixed key, which is easy to crack through repeated attempts. Contents of the invention [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/30H04L9/08G06F21/00
CPCH04L9/08G06F21/6218H04L9/0894G06F2221/2107
Inventor 舒文
Owner FU TAI HUA IND SHENZHEN
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