The article introduces a simple cryptographic method inspired by RSA encryption, which involves:
- An Arduino base station storing an array of numbers.
- Generating a random number and subtracting it from a random array element.
- Passing the array index and subtraction result to a client device.
- The client device, if having the same array, performs the inverse operation and sends the result back.
- If the base station verifies the returned sum matches the original array element, access is granted.