D. J. Bernstein
Fighting patents

US patent 8218760, Joye, compressed RSA keys

Text of the patent
No reported enforcement attempts. Priority date 2007.02.27. "The general inventive idea consists in fixing a large part of an RSA modulus N (e.g., up to its top half in the preferred embodiment) so that the primes forming N can be drawn arbitrarily from an interval (and not tried incrementally as was suggested in previous proposals)."

Prior art: