I can securely store data for you. Guaranteed security - nobody will ever be able to read it. Including you, unfortunately; provide it in hardcopy and I'll burn it and compost the ashes.
All joking aside, you're right. If one person can retrieve the data, there will always be the possibility that someone else can. The concept of SGI is nice, but isn't foolproof and never will be.
Biting the hand that feeds IT
