'Classified knots': Researchers create optical framed knots to encode information

Researchers have been able to create optical framed knots in the laboratory that could potentially be applied in modern technologies. Their work opens the door to new methods of distributing secret cryptographic keys - used to encrypt and decrypt data, ensure secure communication and protect private information.

source https://www.sciencedaily.com/releases/2020/10/201016181039.htm