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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)?

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  • What is a "virtual-reality-door-lock"?
    – schroeder
    Feb 8, 2022 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. Feb 8, 2022 at 17:35
  • So ... you want to know the difference between 2 fictional items you made up?
    – schroeder
    Feb 8, 2022 at 17:57
  • I think the various examples in the linked question will help. Especially: security.stackexchange.com/questions/24407/…
    – schroeder
    Feb 8, 2022 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. Feb 8, 2022 at 18:11

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