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Secure Data Storage... On Your Fingernails
opticsorg writes "Secure optical data storage could soon literally be at your fingertips thanks to work being carried out in Japan. Yoshio Hayasaki and his colleagues have discovered that data can be written into a human fingernail by irradiating it with femtosecond laser pulses. Capacities are said to be up to 5 mega bits and the stored data lasts for 6 months - the length of time it takes a fingernail to be completely replaced."
Ironic that this comes up at the same time as a poll about "least favourite finger" - now they can all be useful again.
I say we take off and nuke it from orbit. It's the only way to be sure...
You bite your fingernails?
Secure optical data storage could soon literally be at your fingertips thanks to work being carried out in Japan. Yoshio Hayasaki and his colleagues have discovered that data can be written into a human fingernail by irradiating it with femtosecond laser pulses. Capacities are said to be up to 5 mega bits and the stored data lasts for 6 months - the length of time it takes a fingernail to be completely replaced. (Optics Express 13 4560)
Fingernail storage
"I don't like carrying around a large number of cards, money and papers," Hayasaki from Tokushima University told Optics.org. "I think that a key application will be personal authentication. Data stored in a fingernail can be used with biometrics, such as fingerprint authentication and intravenous authentication of the finger."
The team's approach is simple: use a femtosecond laser system to write the data into the nail and a fluorescence microscope to read it out. The key to reading the data out is that the nail's fluorescence increases at the point irradiated by the femtosecond pulses.
Initial experiments were carried out on a small piece of human fingernail measuring 2 x 2 x 0.4 mm3. The writing system comprises a Ti:Sapphire oscillator and Ti: Sapphire amplifier. Pulses of less than 100 fs at 800 nm are then passed through a microscope and focused to three set depths (40, 60 and 80 microns) using an objective lens.
Each "bit" of information has a diameter of 3.1 microns and is written by a single femtosecond pulse. A motorised stage moves the nail to create a bit spacing of 5 microns across the nail and a depth of 20 microns between recording layers.
An optical microscope containing a filtered xenon arc lamp excites the fluorescence and reads out the data stored at the various depths. "We regulate the focus with the movement of the microscope objective," explained Hayasaki. "The distance between the planes is set to prevent cross-talk between data stored at different depths."
Hayasaki adds that the same fluorescence signal is seen 172 days after recording.
Although the initial experiments have concentrated on small pieces of nail, the team is now developing a system that can write data to a fingernail which is still attached to a finger. "We will develop a femtosecond laser processing system that can record the data at the desired points with compensation for the movement of a finger," said Hayasaki.
Author Jacqueline Hewett is technology editor on Optics.org and Opto & Laser Europe magazine.
Don't anthropomorphize computers: they hate that.
Imagine losing your data when you hit your thumb with a hammer.
12:50 - press return.
Now we finally understand the full meaning of Bill Gates' quote "640K ought to be enough for everyone".
The AACS key is NOT 0xF606EEFD628B1CA427BEA93A9CA9773F
I'll bet we start seeing guys with all of their nails at 7 inches long. How else are you going to fit all of your porn onto them?
/. ++
There should be continuous data loss as the nail grows. I would assume that the 5mb that they mention would be the entire nail, but part of that data would be lost as soon as you cut or bit your nails, or if they broke off.... Not really sure what you would use this for other than biometric identification, but you would have to be sure that the person did not allow the nail to grow out completely and then cut it off and use the nail as an overlay later.
I reject your reality
Whee! I usually do my data in bytes....
I'm going to do mine in nibbles if it's stored on my fingernails.
That's not all. Now, in addition to having to worry about computer viruses, you're going to have to worry about nail fungus eating your data.
No, the other one...
there's no replacement for displacement
You can have my data when you pry it from my cold, dead hands.
Because if you took it while I was alive, damn, that would just be torture.
MORTAR COMBAT!