This is for a science fiction story I'm writing. Are there ways to transport information like a book, or a computer program, within the human body (not in the brain)? Say, by storing the information using vaccination, and then to read back the information, perhaps doing a blood test...
The basic story idea being that transmitting information electronically has security risks, so the human body is used to store information... people get to whatever destination and then have the information read from their bodies. Johnny Mnemonic was basically this idea but with the information being stored in the brain. I'm wondering if there are other ways.
I've heard of DNA memory.
How far into the future is something like I'm describing above possible? Are there current technologies that can potentially do the above.
Thanks for any information.
EDIT: Thanks everyone for the great responses. Ideally I was looking for something that a living person could transport safely, so perhaps DNA is not a good option.
The story involves someone infiltrating and trying to take down a company that isolates itself electronically... the person goes in, carrying some type of 'computer virus' stored in his body biologically. What I was thinking was... in the future, perhaps biometric scanning will be more extensive... and perhaps during the company's standard biometric scan of people entering, the computer virus could be transported onto the company's computers. I know it's really far-fetched (reminds me of the Independence Day scene). Trying to see if I can make this plausible.