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http://dx.doi.org/10.5139/JKSAS.2005.33.7.098

Telecommand Decryption Verification for Engineering Qualification Model of Command Telemetry Unit in Communications Satellite  

Kim, Joong-Pyo (한국항공우주연구원 통신해양기상위성사업단체계종합그룹)
Koo, Cheol-Hea (한국항공우주연구원 통신해양기상위성사업단체계종합그룹)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.7, 2005 , pp. 98-105 More about this Journal
Abstract
In this paper, the decryption function of CCSDS telecommand of CTU EQM for the security of communications satellite was verified. In order to intensify the security level of DES CFB decryption algorithm applied to CTU EM, 3DES CFB decryption algorithm using three keys is implemented in the CTU EQM. As the decryption keys increased due to the 3DES algorithm, the keys and IV are stored in PROM memory, and used for the telecommand decryption by taking the keys and IVs corresponding to the selected key and IV indexes from the memory. The operation of the 3DES CFB is validated through the timing simulation of 3DES CFB algorithm, and then the 3DES CFB core implemented on the A54SX32 FPGA. The test environment for the telecommand decryption verification of the CTU EQM was built up. Through sending and decrypting the encrypted command, monitoring the opcodes, and confirming LED on/off by executing the opcodes, the 3DES CFB telecommand decryption function of the CTU EQM is verified.
Keywords
Decryption; Encryption; Telecommand;
Citations & Related Records
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  • Reference
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