[jimbob55]

Warp gates could be coded as a combination of Warp point maker / destroyer in one component.
New tech field Spacial manipulation with 5 or 6 levels each leading to a larger component and longer range warp link.
Size 450Kt
Cost vast.
Component can only be used once per turn and all links created are destroyed at the end of the turn.

Adding passwords to individual links would be a bit tricky, coding the component would require development time and add another trash collection loop to the turn process.