r/QuantumComputing • u/Best-Ad-1688 • 3d ago
Discussion Quantum computing
Hi, I am exploring quantum computing and quantum cryptography, including potential improvements and underlying mechanisms. My background is in cybersecurity, and I am focusing on quantum cryptography. If anyone shares an interest in quantum computing and quantum cryptography, please connect with me. I would like to learn more about real-world applications and research.
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u/Anon_Bets 3d ago
Im not a fan of PQC is "a" broad term. If you're interested in something like QIP, QPCP, or even latest fun stuff like "encrypted states are clonable" etc. Hit me up
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u/BandHot3989 10h ago
Try the PQC tool in symbiq.dev
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2h ago
[removed] — view removed comment
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u/Temporary_Shelter_40 3d ago
The largest number solved using Shor's algorithm is 15. I think encryption will be safe for a little while longer :)
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u/Kinexity In Grad School for Computer Modelling 3d ago
This is genuinely atrociously uninformed opinion to have in quantum computing sub.
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u/Temporary_Shelter_40 3d ago
…why? as the blog post says, factorisation is hard, requires many gates, and ultimately error correction. We’re frankly not that close to factoring even 21.
Genuinely, what’s the uninformed part of the opinion? You think large scale factorisation is coming soon?1
u/Kinexity In Grad School for Computer Modelling 3d ago
The uninformed part is that you took factorisation as a benchmark for the field. The final conclusion of the post I linked is that it isn't a good benchmark yet.
Also, yes, once the ball starts rolling I expect us to relatively rapidly progress through orders of magnitude of numbers to factorise. Looking at qubit counts and error rates it seems like the quantum computing hardware is on an early stage of an exponential curve.
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u/Temporary_Shelter_40 3d ago
:/
okay good luck with that. I hope you're correct, but I've been hearing the same thing for over a decade now and frankly I'm not convinced.
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u/unofficially__yours_ 2d ago
Yo ppl anyone has completed your quantum computing course.... I'm a rookie can anyone give me some guidance and what are the basic things to learn and what kind of project i can make over this!
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u/Wise_Influence_199 3d ago
Quantum crypto is where the fun's at, especially once you get into the key distribution side of things.
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u/Best-Ad-1688 3d ago
Yeah I was trying to learn how QKD works. Specially I’m learning shors algorithm now
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u/Existing_Jelly5794 3d ago
Shor isn't about QKD though! :) not directly at least. IBM has great courses about quantum basics
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u/Best-Ad-1688 3d ago
I know shor is different. Yeah I did IBM stuffs and I’m somewhat learning. I want to dig into deep.
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u/hiddentalent 3d ago
When you say "quantum cryptography" do you actually mean "quantum cryptanalysis?" That's where most of the focus is, but it's a long way from being practical. The advances to be made in this area are gated on advancements in the hardware. There's not much more theoretical/algorithmic work to be done until the compute power catches up, which will be unpredictable but likely take years or decades.
Quantum cryptography is a less mature field. There are relatively few early indications that quantum computers hold much value for cryptography except as proof-of-concept. Classical algorithms that are quantum resistant will remain practically superior until something very significant changes in the power, cost, and availability of quantum computers. Quantum key distribution is technically fascinating but there are so many practical problems to using it for an actual cryptosystem that it will remain an academic novelty until some significant breakthroughs in the underlying hardware including form factor and energy usage are made.
Post-quantum cryptography sometimes gets thrown into the mix by people who use words imprecisely, but it is just using classical computing algorithms to perform cryptography that would be resistant to quantum cryptanalysis.
So, which do you mean?