Abstract
The authors consider the problems of key exchange for one-time pad along with the problem of rate sacrifice for secure polar coding over the two-way wiretap channel under the strong security criterion. Based on existing techniques, they present a new hash chaining structure to solve the good bits sacrificing problem for achieving the strong security and constructed encryption embedded secure polar coding scheme for two-way wiretap channel. To implement a one-time pad without any key pre-sharing, they design a secure and reliable transmission for both key and ciphertext coupling with the cooperative jamming strategy, which can also increase the secrecy rate for communication. As proved, extended upper bounds for both achievable secrecy rate pair and effective secrecy rate pair can be achieved under the strong security and reliability criterions.
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