After recognizing that risk, Estonia famously signed an international treaty with Luxemburg "in the spirit of the Vienna Convention" to host an offsite backup (

After recognizing that risk, Estonia famously signed an international treaty with Luxemburg "in the spirit of the Vienna Convention" to host an offsite backup (and plans to extend such initiatives). https://www.riigiteataja.ee/aktilisa/2280/3201/8002/Lux_Info_Agreement.pdf https://www.riigiteataja.ee/aktilisa/2280/3201/8002/Lux_Info...