>security it terrible (even with all the stamps and hand signatures)
Sure, if you're sending a letter. But as long as you maintain physical control over your paper it's far more secure than anything stored on a computer.
There's a reason Russia's FSB bought typewriters instead of a thought-to-be-secure computer system for the storage of its most sensitive secrets.
Not to mention that the security of your letter increases quite nicely when you use thick paper and seal it shut. Yes, with wax.
No, it's not super-secure, but it stops most casual snooping attempts. Taking off (and reattaching) a seal without breaking it is quite a bit of work if you choose the right wax.
Sure, if you're sending a letter. But as long as you maintain physical control over your paper it's far more secure than anything stored on a computer.
There's a reason Russia's FSB bought typewriters instead of a thought-to-be-secure computer system for the storage of its most sensitive secrets.