Security Enhancement Method Using Shortened Error Correcting Codes

This paper proposes two methods that combine high error correcting capability with security enhancement to enable cryptographic communication even under high noise. The first method is a combination of symmetric key cryptography and Shortened LDPC, which enables two-way communication. It can be regarded as one type of mode of operation. The second method combines the McEliece method and Shortened QC-MDPC to realize one-way communication. It has the advantage of fast processing speeds compared to general asymmetric key cryptography and the ability to centrally manage key updates for many IoT modules. We performed computer simulations and analysed practical parameterization and security enhancement. Both methods are found to provide sufficient security and are expected to have a wide range of applications.