This assumes that the body is magnetically conducting. The article implies this, too, with the statements about increased privacy and the claim of employing the body as a communication medium (versus simply having it transparent, which would still be better than its absorption of waves in the GHz range). Can anyone point out numbers and the involved mechanisms? I'd say for static fields the only mechanism would be the iron in the blood, and for dynamic fields possibly the conductivity through ions, but I'm unsure if the latter would even help, as electric conductivity is something that designers usually try to avoid in magnetic cores.