What do you think about the combination of NTRU Prime and X25519 ECDH in OpenSSH 9.0?
Why is the combination of NTRU Prime and X25519 ECDH in OpenSSH believed to be secure against quantum attacks in the future?
when I talk about one-way encryption in quantum computing would reflect would i be able to generate 100% solution that would prevent me from causing a quantum computing collision? We are currently at 99.9% with the current one-way encryption methods, in my opinion?
the current standard password methods have already lost out against the quantum attacks from quantum computing compared to asynchronous encryption methods?
Can i prevent against the 'harvest now, decrypt later' in theory with quantum computing?
I'm going to start a bounty because i need your opinions from
Report from heise.de:
The encryption of user data using a symmetrical method such as AES with 256 or almost any number of bits is not the real problem in attacks by quantum computers. It's "only" about cracking the exchange of the random key pair generated for this purpose, which has so far been done with a conventional Diffie-Hellman key exchange based on elliptic curves (X25519 ECDH).
This method is considered to be susceptible to quantum cryptographic attacks, even if the current (known) performance – i.e. the number of qubits – of the first quantum computer is far from sufficient.
There are many estimates of how many qubits are needed to crack asymmetric encryption in a timely manner, probably in the range of several thousand qubits.
Where is the current research? Google last year showed off its Sycamore processor with 54 qubits.
The OpenSSH developers, as part of the OpenBSD community, are aware that new implementations may contain bugs. Instead of just using a new algorithm, the OpenSSH developers are combining NTRU with the X25519 ECD, which has been the standard up to now. This is supposed to form a kind of safety net, because the old protection still applies even in the case of unknown security gaps or the secret backdoors of the secret services.
What does that mean in theory? For example, if I have in performance, the number of 10,000 or 100,000 of qubits (that's just the theory!!!) would have could I crack the asymmetric encryption?
I don't want detailed explanations about these 2 procedures but why the combination should make it safe.
And now back to my question:
Why is the combination of NTRU PRIME and X25519 ECDH in OpenSSH believed to be secure against quantum attacks in the future?
Some links on the topic: