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What cryptography concept is someone referring to if he says that our galaxy is like key-space and the rest of our universe is like universe of possible numbers where that key-space exists. If you wanted to describe distribution of keys in universe of possible numbers using only one word what would it be?

I thought of confusion, diffusion, uniqueness, robustness, confidentiality, integrity and all other words ending on -ion, -ness and -ity that I have connected with cryptography in my mind, but none seems to be correct one.

Any suggestions?

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put on hold as primarily opinion-based by kelalaka, kodlu, Henno Brandsma, Gilles, Maeher 2 days ago

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ I'm voting to close since primarily opinion-based Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. $\endgroup$ – kelalaka Jan 11 at 21:16
  • $\begingroup$ @kelalaka I do not like these "poetic-like" descriptions of any subject of science too, but someone thought it was obvious what he was referring to in subject of cryptology. At least we are now two whom it is not obvious. $\endgroup$ – azerbajdzan Jan 11 at 21:43
  • $\begingroup$ Do you have any reference to who said it, where and/or the context? $\endgroup$ – Paul Uszak Jan 12 at 2:39
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    $\begingroup$ There aren't many ciphers or other cryptographic primitives that have unlimited key space. However, there are certainly an unlimited amount of numbers. So I would call it a needless, bad analogy. "key space" is the right term, why do you need another? $\endgroup$ – Maarten Bodewes Jan 12 at 21:17
  • $\begingroup$ @Maarten Bodewes For example columnar transposition cipher or generally any permutation cipher has unlimited key space with unlimited key length. And I do not think the author was trying to coin another term for key-space but instead was referring to some cryptology concept that is connected with key-space. $\endgroup$ – azerbajdzan yesterday

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