Unlock instant, AI-driven research and patent intelligence for your innovation.

Aerospace 1553B bus on-orbit key injection device and an on-orbit key injection method

A bus and key-injection technology, applied in computer security devices, instruments, electrical digital data processing, etc., can solve the problem of wasting channel resources, and achieve the effect of safe and reliable protocol and convenient operation.

Pending Publication Date: 2020-05-19
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional method needs to open up a dedicated space-ground communication link for key injection, thus wasting channel resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aerospace 1553B bus on-orbit key injection device and an on-orbit key injection method
  • Aerospace 1553B bus on-orbit key injection device and an on-orbit key injection method
  • Aerospace 1553B bus on-orbit key injection device and an on-orbit key injection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the present invention discloses an aerospace 1553B bus on-orbit key injection device, including a processor, a 1553B interface circuit, an Ethernet interface circuit and an FPGA, wherein:

[0039] The processor is the core circuit of the device, and is used for the control and data interaction of the whole device. In the present embodiment, described processor adopts DSP chip, and described DSP chip adopts TMS320DM642 chip, and TMS320DM642 chip is 32 fixed-point DSPs in TI Company C6000 series DSP, and its core is C6416 type high-performance digital signal processor, has extremely strong Excellent processing performance, high flexibility and programmability, and the peripheral integrates very complete audio, video and network communication equipment and interfaces, especially suitable for machine vision, medical imaging, network video surveillance, digital broadcasting and digital video-based / image processing consumer electronics and other ...

Embodiment 2

[0047] Such as figure 2 As shown, the present invention additionally discloses an on-orbit keying method for the Aerospace 1553B bus, using the above-mentioned Aerospace 1553B bus on-orbit keying device for keying, which specifically includes the following steps:

[0048] Step 1: According to the on-orbit key injection communication protocol, the ground sends the first frame of serial data through the 1553B bus. After the processor reads the frame data, it starts to establish the key injection operation. After injecting the first frame, the processor starts the encryption and decryption device At the same time, stop receiving data from the Ethernet interface. The first frame key has a total of 53 bytes, the first frame is 0x20, and the type used to distinguish the injected data is the first frame data, and the last two bytes are 0x728D. It is the synchronization word, and the remaining 50 bytes are all filled with 0xFF. For the specific frame format, see image 3 shown;

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an aerospace 1553B bus on-orbit key injection device and an on-orbit key injection method. The aerospace 1553B bus on-orbit key injection device comprises a processor, a 1553Binterface circuit, an Ethernet interface circuit and an FPGA. According to a key injection communication protocol, the ground injects a key into a processor through a 1553B bus, after a first frame isinjected, the processor stops receiving data from an Ethernet interface, and meanwhile, a key injection interface of an encryption and decryption module is opened; and then a key frame is injected, and the processor multiplexes an uplink channel of the network task, sends the received key data to the FPGA for processing, and then uploads the key data to the encryption and decryption device. And meanwhile, the encryption and decryption device multiplexes a network task call downlink channel, sends memory downloading data, and the processor caches the data after the data is processed by the FPGA. And finally, a tail frame is injected, and after injection is finished, an RT terminal in the 1553B bus interface circuit puts the memory downloading data into a corresponding RT sub-address sending buffer area, and notifies a KPU to collect the memory downloading data through a service request.

Description

technical field [0001] The invention relates to the technical field of space security, in particular to an on-orbit keying device and an on-orbit keying method for the Aerospace 1553B bus. Background technique [0002] In today's complex international situation, with the continuous development of space applications, space security issues have gradually become the focus of attention. In order to ensure that the data of space-earth communication will not be stolen, it is often necessary to encrypt the data. At the same time, in order to prevent the encryption and decryption algorithm from being cracked and causing leakage, it is necessary to regularly update the key of the encryption and decryption device, so as to update the encryption and decryption algorithm and ensure the security of communication. The traditional key update method realizes the online update of the key by reserving a key injection port on the encryption and decryption device, and then sending data from the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F21/60G06F13/42
CPCG06F21/602G06F13/4282
Inventor 陆彬黄建青戴志晃汪雪峰顾绍景罗鹏黄波苏思友
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM