Re: What would you do?: Assume all Public Key Exchange models in use failed overnight

This wouldn't lead to wide-spread loss of electronic devices, and data.

Using formula from Physics, you can compute the effective force and field strength of a magnetic field given a distance in addition to strength. Like Gravity, the force of field strength relies on the strength of a charge, but the distance is much more important, since the distance is an inverse square applied to any change in charge/field.

So, double the charge, and double the distance, you halve the effective strength to the new distance. Because of this, the effective radius for any EMP bomb is very limited, and addition of more "power" to generate a strong field faces diminishing returns.

A single bomb over the US would not be enough-- even if the power source was nuclear. Many, many EMP would be needed, and then you would have to consider additional power requirements to push the EMI through shielded spaces, and underground storage systems.

This is a risk too. Maybe a topic for another thread on catastrophic failures like doomsday scenarios.

Originally posted by

**xor**View PostUsing formula from Physics, you can compute the effective force and field strength of a magnetic field given a distance in addition to strength. Like Gravity, the force of field strength relies on the strength of a charge, but the distance is much more important, since the distance is an inverse square applied to any change in charge/field.

So, double the charge, and double the distance, you halve the effective strength to the new distance. Because of this, the effective radius for any EMP bomb is very limited, and addition of more "power" to generate a strong field faces diminishing returns.

A single bomb over the US would not be enough-- even if the power source was nuclear. Many, many EMP would be needed, and then you would have to consider additional power requirements to push the EMI through shielded spaces, and underground storage systems.

Even without an attack a solar flare from the sun directed at the planet could be absolutely catastrophic. In fact it has already happened in the past and will happen again.

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