I am a total newbie to cryptography and I would like to know the meaning of a "uniform n-bit string". Also, why keys of that type are commonly used in private-key encryption?
Thanks!
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Welcome to cryptography. Did you take a basic probability theory? Seems not! Not a good starting way to cryptography. See Part I: The Fundamentals. The second part is not clear and the request of a listing is off-topic since too broad. If you ask why uniform since min-Entropy. – kelalaka Feb 10 '22 at 17:56
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Take a fair coin, throw it once, T=1, H=0, this is the first bit. Now throw it again, this is the second, and so on. This is uniformly and independently generated n-bit string. – kelalaka Feb 10 '22 at 17:58
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See: Relation between entropy and min-entropy and Why is Min-entropy significant in cryptography? – kelalaka Feb 10 '22 at 18:03
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2Does this answer your question? What is the difference between uniformly and at random in crypto definitions? and also see Difference between Non-uniformly random and Uniformly random – kelalaka Feb 10 '22 at 18:18
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Absolutely. Thank you – karim abousselham Feb 10 '22 at 18:22
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1+1 for the fast acceptance of the duplicate as my general rule... – kelalaka Feb 10 '22 at 18:50