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Sagi Kedmi

Crypto Classics: Wiener's RSA Attack

18.04.2016, in { crypto, algo }

While reading on RSA I stumbled upon Dan Boneh’s Twenty Years of Attacks on the RSA Cryptosystem 1999 paper. In there, I found a trove of applied attacks against RSA; one of which, Wiener’s, employs continued fractions approximation to break RSA efficiently (under certain conditions).

The attack was interesting enough to make me want to learn about it and spread the word.

So, today we’re going to use simple math and Python to distill Wiener’s Attack :).

Professor P