Improving the Rao-NamSecret KeyCryptosystemUsingRegular EDF-QC-LDPCCodes

نویسندگان

  • Reza Hooshmand
  • Taraneh Eghlidos
  • Mohammad Reza Aref
چکیده

This paper proposes an efficient joint secret key encryption-channel coding cryptosystem, based on regular Extended Difference Family Quasi-Cyclic Low-Density Parity-Check codes. The key length of the proposed cryptosystem decreases up to 85 percent using a new efficient compression algorithm. Cryptanalytic methods show that the improved cryptosystem has a significant security advantage over Rao-Nam cryptosystem against chosen plaintext attacks, benefiting from an improvement on the structure of the Rao-Nam cryptosystem and proper choices of code parameters. Moreover, the proposed cryptosystem benefits from the highest code rate and a proper error performance. c © 2012 ISC. All rights reserved.

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تاریخ انتشار 2011