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Network data encryption and decryption device and method

A technology for encryption and decryption, network data, applied in the field of network communication, can solve problems such as increasing deployment complexity and maintenance difficulty, application service failure, encryption and decryption failure, etc., to improve the stability of the scheme, improve the security, and reduce the complexity of the scheme degree of effect

Pending Publication Date: 2022-06-24
北京从云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme makes up for the shortcomings of scheme 1, but increases the complexity of deployment and the difficulty of maintenance
Once the security server is abnormal, encryption and decryption will fail, resulting in failure of application services

Method used

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  • Network data encryption and decryption device and method
  • Network data encryption and decryption device and method
  • Network data encryption and decryption device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Transparent encryption only encrypts the data above the transport layer, and the data at and below the transport layer is transparently transmitted in the network. like figure 1 , the network data encryption and decryption device in this embodiment includes a first key generation unit, an encryption unit, a second key generation unit and a decryption unit.

[0031] The first key generation unit is configured to extract the characteristic field in the message sent by the source address application device, generate the first key according to the characteristic field, and output the first key to the encryption unit. Feature fields include at least the following fields:

[0032]

[0033]

[0034] The value of the Ethernet frame protocol field is 0x0800, indicating that the packet is a TCP / IP protocol packet.

[0035] The value of the IP version number field is 0x4, indicating the packet version number IPv4 (which is the fourth version of the Internet Protocol).

[...

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Abstract

The network data encryption and decryption device comprises a first key generation unit, an encryption unit, a second key generation unit and a decryption unit, the first key generation unit is used for extracting a feature field in the message, generating a first key according to the feature field and outputting the first key to the encryption unit; the encryption unit is used for encrypting a transport layer load of the message by using the first key according to an encryption algorithm agreed between the source address and the destination address, and transmitting the encrypted message to a network; the second secret key generation unit is used for extracting a feature field from the network message to form a second secret key and outputting the second secret key to the decryption unit; and the decryption unit is used for decrypting the transport layer load of the message from the network by using the second key according to a decryption algorithm agreed between the source address and the destination address, and outputting the decrypted message to the application equipment of the destination address. The encryption and decryption key used in the invention realizes dynamic change, the security is improved, and the cost is low.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a device and method for encrypting and decrypting data above the network transmission layer. Background technique [0002] Transparent encrypted transmission of network data is a widely used link security technology. This technology only encrypts data above the transport layer without establishing a secure tunnel or planning a new IP (Internet Protocol) address. Network topology has no effect. [0003] When implementing network transparent encryption, there are two commonly used schemes: [0004] 1. Deploy a transparent encryption machine between the application device and the network, and the transparent encryption machine completes packet encryption and decryption. The disadvantage of this scheme is that the key of the transparent encryption machine is fixed and the security is hidden. [0005] 2. Deploy transparent encryption devices between applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/16H04L9/40
CPCH04L9/0861H04L9/0863H04L9/16H04L63/0428H04L63/067
Inventor 舒弋
Owner 北京从云科技有限公司
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