spoofing high protected facilities

I just found out, that ionizable impurities fuck their communication...but that doesn't help, since I've been on energy grids blackouts, and on that case, graphene powder directly to the cables could provoke a big electrical over voltage...of couse the same principle of the graphene bomb, anyway, it requires a study if you're making the procedure on the ground...however, since we can not reach inside their facilities....here's my idea....close to any wall, any cable, any metal scratch near by....just couple this device

DIGIKEY.COM

Contactless Sensing with the Hall Effect | DigiKey

This article looks at the basis of operation of Hall Effect sensors and the use of linear and switched Hall Effect sensors in industrial automation applications.

The Hall Effect can also be used to sense current running through a wire or conductor. This is where the technology is becoming increasing popular, with the current path and a Hall element, integrated into a single small package such as an 8 pin SOIC like the Allegro ACS712 devices. 

Hall Effect devices have the primary advantage over other current sensing technologies, as the current sensing path is completely electrically isolated from the low voltage signal input/outputs. The use of flip-chip technology leads to an optimized magnetic coupling between the active face of the Hall element and the field generated by the current to be sensed. This packaging technique eliminates the need for a flux concentrator. The internal resistance of the copper path used for current sensing is typically 1.5 mΩ for low power loss. 

https://www.digikey.com/en/articles/techzone/2013/mar/contactless-sensing-with-the-hall-effect