The current secure network coding has two methods.They are information-theoretic security and cryptography security. Among the encoding methods of information-theoretic security, the encoding scheme of the relay node uses the Random Linear Network Coding(RLNC)to generate the encoding matrix. But this method does not guarantee that the resulting matrix must be full rank and affects the decoding rate. This paper proposes a Multi-Level Network Coding(MLNC)scheme. The scheme uses the triangle matrix to encode s...
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