Dirichlet's approximation theorem: Difference between revisions

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The irrationality measure should be specified - it's the irrationality exponent. Link now points to that specific section, irrationality measure #irrationality_exponent
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This theorem forms the basis for [[Wiener's attack]], a polynomial-time exploit of the [[RSA (cryptosystem)|RSA cryptographic protocol]] that can occur for an injudicious choice of public and private keys (specifically, this attack succeeds if the prime factors of the public key ''n'' = ''pq'' satisfy ''p'' < ''q'' < 2''p'' and the private key ''d'' is less than (1/3)''n''<sup>1/4</sup>).<ref>{{cite journal|last=Wiener|first=Michael J.|date=1990|title=Cryptanalysis of short RSA secret exponents|url=https://ieeexplore.ieee.org/document/54902|journal=[[IEEE Transactions on Information Theory]]|volume=36|issue=3|pages=553–558|doi=10.1109/18.54902 |via=IEEE|url-access=subscription}}</ref>
 
==See also==