  We consider the private classical capacity of a quantum wiretap channel,
where the users (sender Alice, receiver Bob, and eavesdropper Eve) have access
to the resource of a shared quantum state, additionally to their channel inputs
and outputs. An extreme case is maximal entanglement or a secret key between
Alice and Bob, both of which would allow for onetime padding the message. But
here both the wiretap channel and the shared state are general. In the other
extreme case that the state is trivial, we recover the wiretap channel and its
private capacity [N. Cai, A. Winter and R. W. Yeung, Probl. Inform. Transm.
40(4):318-336, 2004]. We show how to use the given resource state to build a
code for secret classical communication. Our main result is a lower bound on
the assisted private capacity, which asymptotically meets the multi-letter
converse and which encompasses all sorts of previous results as special cases.
