rs
Dagobah Resident
In cryptography, the principal is that you create a transform that is mathematically intractable to run backwards. Its not impossible to crack encryption of any strength, it just takes too much computing power in the general case. Or this is the current mathematical understanding.
Quantum computers could in principal decrypt any known algorithm by appearing to run large numbers of trials in parallel.
The only known "secure" encryption is to use entanglement whereby if the transmitted message is received by anyone other than the intended recipient, the act of receiving the message destroys its contents. Apparently even this may not stand up.
http://www.scientificamerican.com/article/time-travel-simulation-resolves-grandfather-paradox/?&WT.mc_id=SA_SPC_20140904
Those "weird evolutions" enabled by a CTC, Ringbauer notes, would have remarkable practical applications, such as breaking quantum-based cryptography through the cloning of the quantum states of fundamental particles. "If you can clone quantum states,” he says, “you can violate the Heisenberg uncertainty principle,” which comes in handy in quantum cryptography because the principle forbids simultaneously accurate measurements of certain kinds of paired variables, such as position and momentum. "But if you clone that system, you can measure one quantity in the first and the other quantity in the second, allowing you to decrypt an encoded message."
My question to the Cs is "is it possible in principal to hide information or is information accessible to all, once they understand how to access it?" Obviously in our 3D STS world it is "trivial" to hide information, but my question is in the grander scale of the universe.
Quantum computers could in principal decrypt any known algorithm by appearing to run large numbers of trials in parallel.
The only known "secure" encryption is to use entanglement whereby if the transmitted message is received by anyone other than the intended recipient, the act of receiving the message destroys its contents. Apparently even this may not stand up.
http://www.scientificamerican.com/article/time-travel-simulation-resolves-grandfather-paradox/?&WT.mc_id=SA_SPC_20140904
Those "weird evolutions" enabled by a CTC, Ringbauer notes, would have remarkable practical applications, such as breaking quantum-based cryptography through the cloning of the quantum states of fundamental particles. "If you can clone quantum states,” he says, “you can violate the Heisenberg uncertainty principle,” which comes in handy in quantum cryptography because the principle forbids simultaneously accurate measurements of certain kinds of paired variables, such as position and momentum. "But if you clone that system, you can measure one quantity in the first and the other quantity in the second, allowing you to decrypt an encoded message."
My question to the Cs is "is it possible in principal to hide information or is information accessible to all, once they understand how to access it?" Obviously in our 3D STS world it is "trivial" to hide information, but my question is in the grander scale of the universe.
