-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 hello Karl, replies in the clear below, as usual :) ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, May 5, 2021 11:14 AM, Karl <gmkarl@gmail.com> wrote:
I have some books digitally archived, but with a focus on shielding rather than covert communications...
this is EMSEC (emissions security) you can play with it youself, speaking of SDR :P https://github.com/martinmarinov/TempestSDR the set of references, sources, and external links on wikipedia is also a fount of information: https://en.wikipedia.org/wiki/Tempest_(codename) enjoy! best regards, -----BEGIN PGP SIGNATURE----- iNUEAREKAH0WIQRBwSuMMH1+IZiqV4FlqEfnwrk4DAUCYJL/L18UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0NDFD MTJCOEMzMDdEN0UyMTk4QUE1NzgxNjVBODQ3RTdDMkI5MzgwQwAKCRBlqEfnwrk4 DIACAP4kC+rW41i3eevP9FiLJi7Szi9J6rUT/5/ZYdA321+mngD/QIKdbboduMmr 8bQtm4nUUFKA06SrYhUUgcgMNuSRgp8= =HVPu -----END PGP SIGNATURE-----