  Semantic security is considered with unreliable entanglement assistance, due
to one of two reasons: Interception or loss. We consider two corresponding
models. In the first model, Eve may intercept the entanglement resource. In the
second model, Eve is passive, and the resource may dissipate to the environment
beyond her reach. We derive achievable rates for both models, subject to a
maximal error criterion and semantic security. As an example, we consider the
amplitude damping channel. Under interception, time division is not necessarily
possible, and the boundary of our achievable region is disconnected. In the
passive model, our rate region outperforms time division.
