"The difference is that if you encrypt a file with a strong, industry standard algorithm, with proper key derivation, enough entropy on your passphrase, and sti

"The difference is that if you encrypt a file with a strong, industry standard algorithm, with proper key derivation, enough entropy on your passphrase, and stick it on a $27 USB key, you can be personally certain (by most reasonable standards) that your data is secure at rest." And how much does it cost to convince 100,000 users to do this correctly, consistently? And to convince someone else that your personal certainty is worth a damn?