  This paper studies adaptive coding for the two-way wiretap channel.
Especially, the strong secrecy metric is of our interest that is defined by the
information leakage of transmitted messages to the eavesdropper. First, we
consider an adaptive coding, the construction of which is based on running the
well studied non-adaptive coding in several rounds and the dependency between
the adjacent rounds of transmission is introduced by the key exchange mechanism
that is embedded in the non-adaptive coding in each transmission round. As a
result, we analyze the reliability and strong secrecy that are measured by the
decoding error probability and information leakage, characterize them in terms
of the conditional R\'enyi mutual information, and derive inner bounds on the
secrecy capacity regions for the TW-WC under strong joint and individual
secrecy constraints. Second, we introduce another adaptive coding method that
explores the correlation among the outputs at the receivers. With this
approach, we show that for the two-way wiretap channel that fulfills the
conditionally independent condition, positive transmission rates can be always
guaranteed even under the joint secrecy constraint.
