DNA as a Hard Drive: Researchers Make Genetic Material Rewritable
US researchers are turning DNA into a rewritable hard drive. All the data in the world could theoretically fit in a shoebox – and remain secure from hackers.
A team at the University of Missouri has developed a method to delete and overwrite data stored in DNA, transforming the genetic material from a simple archive into a rewritable digital storage medium with immense storage density and a potential lifespan of thousands of years. The study was published in the journal PNAS Nexus.
From Disposable Storage to Rewritable DNA
The concept of storing digital information in synthetic DNA dates back decades, with physicist Richard Feynman first proposing the idea in 1959. The principle involves translating binary code (sequences of zeros and ones) into combinations of the four chemical building blocks of DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). Special machines then synthesize DNA strands encoding this information.
Historically, a key limitation was the inability to modify data once written to DNA. This made it suitable for long-term archiving but impractical for everyday use where files are regularly updated or replaced.
Professor Andrew Gu’s team has now overcome this obstacle. “DNA is incredible – it stores the blueprint of life in a tiny, sturdy package,” Gu explained. “We wanted to find out if we could store and rewrite information at the molecular level faster, easier and more efficiently than ever before.”
How the Data is Read
To retrieve stored files, the team is developing a compact electronic device featuring a nanopore sensor. This sensor detects DNA as it passes through a tiny pore, generating electrical signals. Software then converts these signals back into zeros and ones, reconstructing the original file – whether it’s a photo, video, or document.
Researchers state their system is faster, simpler, and more environmentally friendly than previous DNA storage approaches. The long-term goal is to reduce the device to the size of a standard USB stick.
Huge Capacity and Protection Against Hackers
The potential benefits of DNA storage are significant. DNA stores information in three dimensions, unlike traditional flat chips, resulting in exceptionally high storage density. Theoretically, all the world’s data could fit within a shoebox.
Stored in a cool, dry environment, DNA remains stable for thousands of years and consumes far less energy than conventional data centers.
DNA offers inherent security advantages. Because DNA exists as a physical molecule and isn’t constantly connected to the internet, it provides a strong defense against cyberattacks.
“Think of it like an extremely secure vault for your digital life,” Gu said. “DNA storage could protect everything from personal memories and important documents to scientific data and corporate archives – without the added concerns of cybersecurity.”