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The thing that helped me to understand what is a "public key" was to parallel it with a door lock:
The door lock is public in the sense that anyone can try to unlock it and the door key is the private in the sense that generally, only certain user or people should use it.

Virtualwise, what is the essential difference between say the most advanced (3D-virtual-reality) door-lock to the simplest (virtual) public key?

Is the difference primarily in quantity (the amount of information to try to brute force) or is it primarily in quality (the types of problems to try to solve)?

humble-learner
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  • What is a "virtual-reality-door-lock"? – schroeder Feb 08 '22 at 17:25
  • Hello @schroeder , I meant to a virtual reality environment in which we have modeled a house with a grade A door lock on the front door. – humble-learner Feb 08 '22 at 17:35
  • So ... you want to know the difference between 2 fictional items you made up? – schroeder Feb 08 '22 at 17:57
  • I think the various examples in the linked question will help. Especially: https://security.stackexchange.com/questions/24407/principle-of-asymmetric-algorithm-in-plain-english/26210#26210 – schroeder Feb 08 '22 at 17:59
  • @schroeder I misunderstand your comment because you well know that public keys are not fictional and modeling reality is something serious so I would assume that the questions is **principally** valid. – humble-learner Feb 08 '22 at 18:11
  • Modelling requires an epistemologically stable common foundation between items. You are making up all your items. So, either only *you* know the commonalities, or you are hoping we will come up with a cohesive model for you. So, set aside your proposed model, and investigate the models provided by the linked question. Modelling reality is principally valid. That's what the other question does. – schroeder Feb 08 '22 at 18:39
  • @schroeder indeed I didn't have any specific idea and hoped for someone to answer with examples of actual usecases and I don't investigate this so please never mind, but I did try to ask a new better question :https://security.stackexchange.com/questions/259438/is-the-term-only-unlocking-key-more-accurate-than-the-term-private-key – humble-learner Feb 08 '22 at 18:52

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