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Patterned Optical Chips That Emit Chaotic Light Waves Keep Secrets Perfectly Safe:
The one-time pad has proven absolutely unbreakable. Its secrecy rests on a random, single-use private key that must be shared ahead of time between users. However, this key, which needs to be at least as long as the original message, remains difficult to produce randomly and to send securely.
Fratalocchi's team has developed an approach to implement this encryption technique in existing classical optical networks using patterned silicon chips. The researchers patterned the chips with fingerprints to obtain fully chaotic scatterers that cause mixed light waves to travel in a random fashion through these networks. Any modification, even infinitesimal, of the chips generates a scattering structure that is completely uncorrelated to and different from any previous one. Therefore, each user can permanently change these structures after each communication, preventing an attacker from replicating the chips and accessing the exchanged information.
Moreover, these scatterers are in thermodynamic equilibrium with their environment. Consequently, an ideal attacker with an unlimited technological power and abilities to control the communication channel and access the system before or after the communication cannot copy any part of the system without reproducing the surroundings of the chips at the time of the communication.
"Our new scheme is completely unbreakable regardless of the time or the resources available, today or tomorrow," Mazzone says.
Journal Reference: A. Di Falco, V. Mazzone, A. Cruz and A. Fratalocchi, Perfect secrecy cryptography via mixing of chaotic waves in irreversible time-varying silicon chips Nature Communications.
DOI: 10.1038/s41467-019-13740-y
(Score: 2) by JoeMerchant on Monday June 08 2020, @02:12PM (3 children)
Any completely unbreakable scheme is vulnerable to magic.
Any technology sufficiently advanced will appear as magic.
One thing we have repeatedly demonstrated in the past century is the advancement of technology in ways unanticipated.
From my 5 second scan of the summary, it seems like they think they've got a one-time pad, that's the information theory of it. When the chaos underlying their one-time pad is fully understood and predictable, it will be broken.
Bi-directional time travel would appear to be impossible, when that is proven incorrect there will be no more secrets.
🌻🌻 [google.com]
(Score: 0) by Anonymous Coward on Monday June 08 2020, @08:44PM
The unbreakable scheme of TOMORROW - - - TODAY!
(Score: 0) by Anonymous Coward on Tuesday June 09 2020, @12:51AM (1 child)
There. FTFY.
Time travel into the future is happening as I type. I'm traveling into the future at ~1 second/second as measured in my reference frame.
What's more, time travel into the past is theoretically possible [wikipedia.org], but is (currently) far beyond our scientific and technological capabilities. But it is possible, with some restrictions.
(Score: 2) by hendrikboom on Tuesday June 09 2020, @11:38AM
That time-travel link was amusing, especially its mention of "classical quantum gravity". "classical" and "quantum" were once opposites!