I don't think that I personally have a "defeatist attitude". To guard yourself against someone with superior resources but no superpowers is possible, but you do have to be very careful.
"cryptography" is not enough - but good cryptography with good passwords, and due care at the points where the decryption happens may be.
"cryptography" is not enough - but good cryptography with good passwords, and due care at the points where the decryption happens may be.