A mathematician circumvented DVD copy protection by converting a DVD copying program into a single massive number and modifying it until it became a prime number, exploiting the legal principle that mathematical concepts cannot be made illegal, thus allowing the program to function as working code when converted back.
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The Prime Number That Hid Illegal Code š®Added:
If you took a DVD and tried to make a copy, it would not work because DVDs are locked with a secret [music] code that only DVD players can read. But in 1999, a teenager made a tiny program that could break that code, letting you copy a DVD. Now companies have tried to ban it. So a mathematician turned the entire program into one massive number. Then he tweaked it until that number became a prime number. Now a prime number is just math, [music] and you can't make math illegal. So now when that number is turned back into the program, it turns back into working code that lets you copy a DVD.
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