Pfft, that would just preserve it. Better to memorize the contents while under hypnosis such that nobody -- not even you -- can access your memory without the appropriate.. aw shit!
That's seriously bush league. If you can't be bothered to build a doomsday device and destroy the entire planet while at the same time inventing the technology to become immortal so that you can patiently wait from a small space station observing the once known as earth rubble to make sure any alien race surveying the ruins is obliterated with your high powered space lasers then you're just begging for your data to be stolen.
"An organization dries up if you don't challenge it with growth." -- Mark Shepherd, former President and CEO of Texas Instruments