  We study a symmetric Gaussian wiretap channel with a helper, where a
confidential message is sent from a transmitter to a legitimate receiver, in
the presence of a helper and an eavesdropper, under a weak notion of secrecy
constraint. For this setting, we characterize the optimal secure generalized
degrees-of-freedom (GDoF). The result reveals that, adding a helper can
significantly increase the secure GDoF of the wiretap channel. The result is
supported by a new converse and a new scheme. In the proposed scheme, the
helper sends a cooperative jamming signal at a specific power level and
direction. In this way, it minimizes the penalty in GDoF incurred by the
secrecy constraint. In the secure rate analysis, the techniques of noise
removal and signal separation are used.
