Mind probe

A mind probe is a device that allows someone to probe another beings mind to search and retrieve information.

According to Miles O'Brien in 2375 such devices were banned within the Federation. However other races made use of the technology, one being the Romulans. 

In a simulated future that Terri Letac experienced by 2391 mind probes were no longer illegal in the Federation with the Federation even designing such a device. The device was considered safe to use and would not cause any damage to the person it was used on. It relied on the person recalling memories rather then the device forcing the memories out of the person. The devise was also able to stimulate the neural pathways in the brain to access isolated sections of memory.
 * This device is based on the memory recall device used in Stargate SG-1.